The publishing and editorial teams would like to thank the following, for their invaluable service as 2021 reviewers for this journal. We are very grateful for the contributions made. With their help, the journal has been able to publish such high-quality articles:

• A, B
• A, Suresh Kumar
• Aaqib, Syed Mutahar
• Abadou, Yacine
• Abbas, A
• Abdallah, Bassam
• Abdelaziz, Logbi
• Abdelsalam, Sara I.
• Abderrahmani, Sifeddine
• Abro, Ghulam E Mustafa
• Aggarwal, Apeksha
• Agrawal, Eshan
• Ahmad Zakwan, Fariz Aswan
• Ahmad, L
• Ahmadi, Amin
• Ahmed , Bellaouar
• Ahmed, Lukman
• Akhtar, Modassir
• Akop, Mohd Zaid
• Al-Bahadli, Hussein
• Alagumalai, Avinash
• Alhuyi Nazari, Mohammad
• Ali, Benatiallah
• Ali, H
• Ali, Zain Anwar
• Aliyu, Muhammad
• Alkahari, Mohd Rizal
• Alkmin, Vander
• Ambade, Sachin
• Ameli, Alireza 
• Amin, Mohamed
• Amit, Swetha
• Antil, Parvesh 
• Aquilanti, Alessia
• Aredo, Mesfin
• Arif, Sheeraz
• Arora, Hitesh
• Arulraj, Prince
• Arvin, Mohammad Reza
• Asaduzzaman, Chowdhury, Mohammad 
• Aswad , Raya
• Avramenko, Andrey
• Awasthi, S
• Ayana, Melkamu
• Azarafza, Mohammad
• Azrin, Saiful
• B T, Kannan
• B, Satish Ben
• Babu A., Veeresh
• Bagyaraj, M
• Bahar, Ali Newaz 
• Bahman , Malaki 
• Bahubalendruni, M V A Raju
• Bajpai, Tapas
• Balasubramanian, Karthik
• Balasubramanian, M
• Bali, Vikram
• Bansal, Amit
• Barahuie, Farahnaz
• Barour, Sabiha
• Basmaci, Ayse Nihan
• Bavirisetti, Sushanth
• Behera, Diptikar
• Bellairu, Pavana
• Bhat, Rujuta
• Bhoi, Neeraj Kumar
• Bilal, M
• Bilal, S
• Bin Iderus, Samat
• Bin Kaderi , Akbar 
• Bishnoi, Pawan
• Biwalkar, Ameyaa
• Bopche, Santosh
• Buddhadeva , Sahoo
• Butola, Ravi
• Caggiano, A
• Chand, Gaurav
• Chau, Kwok-Wing 
• Chaudhary, Abhishake
• Chauhan, Nitin
• Chen, Chao 
• Chen, Xl
• Cheng, Yao
• Chinchanikar, Satish
• Choudhary, Tushar
• Chowdhury, Anandita
• Churi, Prathamesh
• Churi, Prathmesh
• Chwała, Marcin 
• Colangelo, Francesco
• Costabile, Pierfranco
• D, Ravichandra
• Damala, Rajesh Babu
• Dang, Xugang
• Danish, Aamar 
• Das, Shubhajit 
• De'nan, Fatimah
• Dehghani-Sanij, Alireza 
• Dewangan,  Ashok K. 
• Dharmadurai, Leon
• Dhiman, Gaurav
• Di Lillo, Paolo
• Dueñas Santana, Julio Ariel
• Dutta, Debabrata
• Dutta, Rakesh Kumar
• El Haj Assad , Mamdouh 
• Erinle, Tunji
• Erinle, Tunji John 
• Esfandiari,  J.
• Ezeh, Ernest
• Faraji, Jamal
• Farina, Ilenia
• Farqad , K.J. Jawad
• Farzin , Ghadami
• Fattah, Mohammed
• Ferreira, F.V.
• Filiz, Seçkin
• Flores, Erick 
• Foroutan, Maziar
• Fu, Binguo 
• G, Saravanan 
• Gampala, Veerraju
• Gan, Chong Leong
• Ganesh, A. Chithambar 
• Ganet, Tarek
• Garg, Suresh Kumar 
• Gas, Piotr
• Ghafoori, Yaser
• Gharaibeh, Mohammad
• Gharechae, Ataollah 
• Ghazvinloo, Hamid
• Ghernaout  , Redouane
• Giwa, Solomon 
• Glowacz, Adam
• Goodarzimehr, Vahid
• Goyal, Khushdeep
• Gulati, Vikas
• Gupta, Krishanu
• Gurugubelli, Sasidhar
• Habibi, Hamed 
• Hachemi, Samya
• Hamadneh, Nawaf
• Hashim, Nor Salwani
• Hasnain, J
• Hayat, Beenish 
• Heng, Li 
• Hu, Tafeng
• Huang, Yongxian
• Huo, Zhen
• I, Srinivasula Reddy
• Imran, Muhammad
• Ismail, Zul-Atfi
• Ivanov, Toni 
• J, Amudhavel
• J, Bruce Ralphin Rose
• J, Ramkumar
• Jagannathan, J. 
• Jahangiri, Mehdi
• Jain, Anurag
• Jain, Prince
• Janiga, Damian
• Javaid, Mohd
• Javed , Shumaila 
• Jawale, Hemant
• Jeet, Rubal 
• Jena, Lambodar
• Jha, Dr. Uc
• K, Praghash
• K, Shunmugesh
• Kadri, Mohammed
• Kakunuri, Gopi Krishna 
• Kali, Naresh
• Kamboozia, Neda 
• Kao, W.H. 
• Kar, Sanjeeb
• Karalis, Dg
• Karim Buksh, Shakir
• Karimi, Ahmad
• Karthigai Priya, P Karthigai Priya
• Kaswan, Mahender Singh
• Kataria, Mukul
• Kaur, Amandeep
• Kaur, Satnam
• Kavimani, Kavimani V
• Kazmi, Syed Minhaj Saleem 
• Khan, Muhammad
• Khanmohammadi, Shoaib
• Khatib, Tamer 
• Khatibi, Hamed
• Khayyer, Abbas 
• Khodsouz, Masoume
• Khorampour, Pourya
• Kiam, Jj
• Kim, Jun Song 
• Kordjazi, A
• Kou, H
• Kuczek, Lukasz
• Kulwant , Singh
• Kumar, Deepak
• Kumar, Narendra 
• Kumar, Rajesh
• Kumar, Ravinder
• Lautre, Nitin Kumar
• Lazaar, Khalil 
• Le, Dac-Nhuong
• Lee, Hyoung-In
• Li, Hezong
• Li, Jinfeng 
• Li, Xian-Xing
• Li, Yancang
• Li, Yuzhong
• Li, Zj
• Liu, Dong
• Lohani, Tarun Kumar
• Lokesh , Gupta
• M, Chithirai
• Ma , Quanjin
• Madan, Royal
• Mahmoudzadeh, Ahmadreza
• Mahottamananda, Sri Nithya
• Maia, E
• Makinde, Oluwole Daniel
• Mal, Sandip
• Malhan, Rakesh
• Malik, Anup
• Malik, Satish Kumar
• Mandal, Prosun
• Mandapati, Mohan Jagadeesh Kumar
• Manokar, Muthu
• Maputi, Edmund
• Mardookhpour, Alireza
• Martín Gómez, David
• Martinka, Jozef
• Maurya, Manish
• Maurya, Nagendra
• Mebarek-Oudina, Fateh 
• Mehta, Vishal
• Memon, Hafeezullah
• Mendler, Alexander
• Merizgui, T
• Miklaszewski, Andrzej
• Mirjalili, Seyedali 
• Mishra, Aviral
• Mishra, Sruti
• Morkhade, Samadhan
• Mosaad , Mohamed I. 
• Mouralova, K. 
• Mousavi-Aghdam, Seyed Reza
• Mousavi, Sayed-Farhad
• Muduli, Dr. Kamalakanta 
• Muhamad Khairussaleh, Nor Ashikin
• Musharaf, Nahid 
• Mustapha, Khameel
• N V, Raghavaiah
• N, Anand
• Nageswararao, B. 
• Nair, Rajit
• Najaf, Erfan
• Nakhaei, Fardis
• Narayan, S
• Naser, Fh
• Naser, Mh
• Nayak, Smrutiranjan
• Nezzari, Hassene
• Ngo, Tuan T
• Ngonda, Tiyamike
• Ngongondo, Cosmo
• Nguyen, Vu Linh
• Nigam, Parul
• Nithesh, Naik
• Nuruzzaman, Md
• Nwankwo, Chinyere
• Nyatchouba Nsangue, Bruno Thierry
• Ojha, Avinash
• Okekunle, Pious
• Onyelowe, Kennedy
• Otchere, Daniel
• P, Deepa
• P, Vamsi Krishna
• Pacheco, Alex
• Pachideh, Ghasem
• Palermo Junior, Leandro
• Pandey, Anish
• Pandey, M
• Panigrahi, Bivas
• Panigrahi, Susant Kumar
• Panwar, Ranvir Singh
• Patel, Tejas
• Pathak, Abhinav
• Patil, Rutu
• Patnaik, Rajesh Kumar
• Pattanaik, Madhu Lisha
• Pattanaik, Sudhir Ranjan
• Paul, Sam
• Peerzada, Mudasir
• Peyron, Quentin
• Pienkowski, Krzysztof
• Piestrak, Stanislaw
• Prashanth, B. U. V.
• Puri, Tanvi
• Quedou, Pritish
• Qureshi, Amin
• Rahimi-Esbo, Mazaher
• Rahmani, Omeid 
• Rajendran, C. 
• Rajeyyagari, Siva Ram
• Ramadhan Al-Obaidi, Ahmed 
• Ramesh, M. 
• Randhawa, Kawaljit
• Ranjbar, Mehdi
• Rao, Vandana
• Ratanakamnuan, Usarat
• Rather, Sajad
• Ray, Atul
• Razmjooy, Navid
• Reddy, Ramana
• Rehmani, Shahzaib
• Rezaei, M
• Rezaei, Mohammad Mahdi
• Riaz, M
• Roque-Silva, Lucas
• Roy, Dr Bijan Kumar 
• Roy, Krishanu 
• Roy, R
• S G, Rahul
• S, Dr. Gandhiya Vendhan
• S, Sendilvelan
• Sadeghi-Nik, Aref 
• Sadeghzadeh, Milad
• Saeed, Soobia
• Safari, Mir Jafar Sadegh
• Safdari Shadloo, Mostafa
• Saffari Pour, Mohsen 
• Sahu, Mithilesh
• Sahu, Sonika
• Saiduzzaman, Dr. Md.
• Saleh, Hm
• Samal, Sarita
• Samvatsar, Kaustubh
• Sanghvi, Kavish
• Sardana, Neha 
• Sarkar, Abhinandan
• Sarkar, Pardeep 
• Sathiparan, Navaratnarajah
• Seela, Chiranjeeva Rao
• Seyed Saman , Khedmatgozar Dolati
• Shabaz, Mohammad
• Shafiq, Muhammad
• Shah Ismail, Mohd Idris 
• Shah, Krishna
• Shahanwaz , Khan
• Shahsavari, Davood
• Shakhawat Hossain, Mohammad 
• Shanmuganthan, Vimal
• Sharma, Deepak 
• Sharma, Mukesh 
• Sharma, Prashant
• Sharma, Tarun
• Sharma, Vipin K.
• Shashwat, Anurag
• Shawl, Rashad
• Shemshadi, Asaad
• Sidhu, Varinder
• Sihag, P
• Singh, Avjeet
• Singh, Dileep
• Singh, Kanwal Jit
• Singh, Kiran Deep
• Singh, Kshatrapal
• Singh, Narinder
• Singh, Prabhdeep
• Singh, Ravi Pratap
• Singh, Rupinder
• Singh, Tanvir 
• Sohani, Ali
• Sohel, Kazi M.A. 
• Soni, Mukesh
• Sossou, Gnida
• Soudagar, Manzoore Elahi M. 
• Srinivasan, Gomathi
• Srinivasulu, A
• Sriram, V. 
• Subbiah, Ram 
• Suleman, Malik Shoaib
• Suman, Rajeev 
• Suresha, B.
• Szabados, György 
• Tafraoui, A 
• Tahenni, T
• Talla, Gangadharudu
• Talpur, Mir Aftab Hussain
• Tan, Xiao Jian
• Tan, Yee Yong
• Taouche-Kheloui, Fatma
• Taufik, Mohd
• Tevatia, Abhishek
• Tewari, Saurabh 
• Thakur, Lalit 
• Thanikanti, Sudhakar Babu
• Thapa, Ashok
• Tharewal, Sumegh
• Thompson, Roney
• Tian, Xianhua
• Tiwari, Amit
• Twaróg, Bernard
• Tyagi, Ankit 
• Ul Haq, Mir Irfan
• Uslu, F
• Ustkoyuncu, Nurettin 
• V, Sivamaran
• Vaishya, Awadhesh Kumar
• Vajdian, Mehdi 
• Valigi, Maria Cristina
• Vasudev, Hitesh
• Vasudev, Hitesh 
• Velan, S. Sendil 
• Verma, Abhishek
• Vir, Karan
• Vishnuram, Pradeep
• Wang, Chuanchuan
• Watson, Andrew
• Workneh, Aschalew  Cherie
• Wyn, Hons K. 
• Xavier, Matheus S. 
• Xu, Wc
• Xu, Xiaoyang
• Yadav, Kusum
• Yao, C.
• Yi, Shuang
• Yildiz, Hacer A.
• Yilmaz, Mustafa
• Youcef, Bouamra 
• Zarei, Hamid
• Zeeshan, A.
• Zeghichi, L. 
• Zekri, N. 
• Zerrouki, Djamal
• Zhang, Fuchen
• Zhang, Liang
• Zhang, Shiping 
• Zhang, Siqi 
• Zhang, Zhiqing
• Zhou, Kun 
• Zhu, Lida
• Zhu, Y 
• Zia, Razia 
• Zohreh, Sheikh Khozani
• Акиянова, Фарида