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:
- Abdel Raheem, Shehata E
- Amine, Mohamed
- Arcieri, Emanuele Vincenzo
- Bandyopadhyay, Debasish
- Barreto Caldas, Rodrigo
- Cavaleri, Liborio
- Chandra, Ramesh
- Chaudhary, Muhammad T.A.
- Chliveros , George
- Dantas, Rita
- Daud, Ruslizam
- De Castro, P.M.S.T.
- Dos Santos, White José
- Fantuzzi, Nicholas
- Fei, Cheng-Wei
- Gao, Jianxiong
- Georgievskaia, Evgeniia
- Ghazali, Farizah Adliza
- Golewski, Grzegorz Ludwik
- Gong, Chenjie
- Güçlüer, Kadir
- Guian, Qian
- Guida, Michele
- Han, Seungho
- Hawryszków, Pawel
- He, Jun
- Hu, Dianyin
- Huh, Yong-Hak
- Jaganathan, Jayaprakash
- Jawdhari, Akram
- Jianhui, LIU
- Kaewunruen, Sakdirat
- Karachalios, Evangelos
- Lesiuk, Grzegorz
- Li, Lang
- Liao, Ding
- Liberatore, Laura
- Lin, Lan
- Liu, Changhong
- Liu, Fei
- Liu, Xintian
- Liu, Zhongxiang
- Lu, Yao
- M, Manjunatha
- Machado, Tiago Henrique
- Magalhaes, Antonio
- Marasco, Sebastiano
- Matula, Izabela
- Mendes, Paulo
- Meng, Debiao
- Mirisidis, Ioannis
- Mosleh, Araliya
- Mourão, António Manuel
- Nahal, Mourad
- Najaf, Erfan
- Oliveira, Sara
- Pantazopoulou, Stavroula
- Pantò, Bartolomeo
- Pastrama, Stefan Dan
- Pellegrino, Carlo
- Perogamvros, Nikolaos
- Polydoropoulou, Panagiota
- Pruncu, Catalin I.
- Rafiee, Roham
- Rahnavard, Rohola
- Ray, Rupam
- Ren, Diandian
- Rigon, Daniele
- Rodopoulos, Chris
- Rozumek, Dariusz
- Růžek, Roman
- Savaidis, George
- Savaidis, Georgios
- Sen, Mrinal Kanti
- Sharma, Dr. Vijay
- Shim, Changsu
- Singh, Salvinder
- Song, Lu-Kai
- Strzelecki, Przemysław
- Sun, Bin
- Sun, Kuo
- Tastani, Souzana
- Torzewski, Janusz
- Wang, Geng Sheng
- Wang, Jin
- Wong, King Jye
- Wu, S.C.
- Xin, Haohui
- Yang, Haibo
- Yang, Yanhong
- Yassen, Mohamed
- Yu, Shui
- Zhang, Xiaoling
- Zhang, Youyou
- Zhao , Yinghao
- Zheng, Xiaohong
- Zhong, Shuncong
- Zhu, Shun-Peng
- Zvirko, Olha