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:
- Ab-Samat, Hasnida
- Abdul-Nour, Georges
- Abdullah Saleh, Alia
- Achetoui, Zineb
- Aghaee, Milad
- Ait-Kadi, Daoud
- Al-Hadidi, Laith
- Al-Momani, Hesham
- Al-Turki, Umar
- Alalawin, Abdallah
- Alaswad, Suzan
- Almeida, Nuno
- Anis, Chelbi
- Annamraju, Syamsundar
- Anusha, Chintada
- Asadpour, Milad
- Attia, Ahmed
- Avellaneda, Manuel
- Awad, Mahmoud
- Baglee, David
- Basavankattimath, Murgayya
- Bengtsson, Marcus
- Biazzin, Cristiane
- Bilal, Muhammad
- Caicedo, Pablo
- Cárcel-Carrasco, Javier
- Cardoso-Júnior, Moacyr
- Castro Pinto, Fernando Augusto
- Catt, Phil
- Certa, Antonella
- Chatterjee, Prasenjit
- Chu, Jian
- Da Silva, Renan
- Daneshvar, Sahand
- Darghouth, Mohamed Noomane
- De Souza, Gilberto Francisco
- Dehombreux, Pierre
- Del Vecchio, Carmen
- Dhiman, Pooja
- Divya, D.
- Doiro, Manuel
- Dong, Wenjie
- Duffuaa, Salih
- Effendy, Nazrul
- El-Alaoui, Ali
- Farinha, José
- Farsi, Mohammad
- Fathi, Mohammad Reza
- Felecia, Veronica
- Feugier, Antoine
- Firdaus, Nofirman
- Gao, Xiaojing
- Giacotto, Alessandro
- Giacotto, Alessandro
- Goyal, Neeraj
- Gugaliya, Agam
- Hassanain, Mohammad A.
- He, Yihai
- Herath, Nilupa
- Hoseinizade Mazlumi, Seyyed Hesam
- Hoseinpour, Zahra
- Jain, Vineet
- Kabir, Golam
- Karar, Ahmed
- Karevan, Ali
- Kerni, Love
- Khan, Faisal
- Kimera, David
- Klemeš, Jiri Jaromír
- Kolus, Ahmed
- Kour, Ravdeep
- Krause, Dieter
- Kumar, Girish
- Kumar, Parshant
- Kumar, Rahul
- Kumar, Ravinder
- Labib, Ashraf
- Lai, Chia Tai Angus
- Lepkova, Natalija
- Leva, Maria Chiara
- Li, Guangzheng
- Lima, Vanda
- Liu, Hu-Chen
- Lopez, Maximiliano
- Malmqvist, Johan
- Manea, Mihaela-Greti
- Mech, Apatnaik
- Milkiewicz Sanches, Alexandre
- Moerman, Jan-Jaap
- Moghaddam, Kamran
- Mohammed, Awsan
- Mohtashami Borzadaran, G. R.
- Muślewski, Łukasz
- Naji, Amal
- Narkhede, Balakrishna
- Osman, Hany
- Özcan, Evrencan
- Pająk, Michał
- Patil, Rajkumar
- Patnaik, Amar
- Pfeiffer, Sabine
- Pintelon, Liliane
- Pulkkinen, Antti
- Qingan, Qiu
- Ram, Mangey
- Razmi-Farooji, Arian
- Redmer, Adam
- Riahi, Mohammad
- Saidi-Mehrabad, Mohammad
- Saleh, Haitham
- Salleh, Mad Ithnin
- Santos, Zirlene Alves
- Selim, Shokri
- Sellitto, Miguel
- Shafiee, Mahmood
- Sharma, Garima
- Sheikhalishahi, Mohammad
- Soares, Fabrízzio A. A. M. N.
- Song, Wenyan
- Strauss, Alfred
- Subramaniyan, Mukund
- Tang, Kunjian
- Tinga, Tiedo
- Tufekci, Suleyman
- Ulkuniemi, Pauliina
- Wang, Weizhong
- Wu, Tonghai
- Yaşin, Mehmet Fatih
- Yildirim, Mehmet Bayram
- Yunusa-Kaltungo, Akilu
- Zhang, Xiaohong
- Zhao, Bin
- Zhao, Fei
- Zhao, Xufeng