We thank the following reviewers for their contribution and support in 2021.
Nisar Ahmad
Pakistan
Erman Akkus
Turkey
John J. Araujo
Colombia
Zhaohui Bai
China
Mirza Rafi Baig
Dubai
Sudip Banerjee
India
Ebru Basaran
Turkey
Jiasheng Cao
China
Tianzhen Chen
China
Hongwei Cheng
China
Talha Bin Emran
Bangladesh
Yuchen Fan
China
Yinghong Feng
United States
Qi Feng
China
Janaina Fernandes
Brazil
Xinsheng Gu
China
Surampalli Gurunath
India
Darlan Gusso
Brazil
Chao Han
China
Noriko Hirai
Japan
Tahereh Hosseinabadi
Iran
Qing Huan
China
Zhen-peng Huang
China
Jia Huang
China
Zhenpeng Huang
China
Irina Ielciu
Romania
Tuo Ji
United States
Tom C Karagiannis
USA
Nicholas Kipshidze
USA
Weijun Kong
China
Xin Li
China
Boyu Li
China
Michael Liebman
United States
Michael N Liebman
USA
Peng Liu
China
Linsheng Liu
China
Lianxiang Luo
China
Rafiullah Baig Mirza
United Arab Emirates
Elsayed A Mohamed
Egypt
Saeed Mohammadi
Iran
Muhammad Nawaz
Saudi Arabia
Anna Pratima Nikalje
India
Amany Nofal
Egypt
Shuta Ohara
Japan
Lei Pei
China
Minhua Peng
China
Hakim Rahmoune
Algeria
Senthilkumar Rajagopal
India
Ali Saber
Netherlands
Celestino Sardu
Italy
Marco Sebastiani
Italy
Muhammad Shahid
Pakistan
Junping Shi
China
Rajesh Kumar Singh
India
Donglei Sun
China
Toshinori Takada
Japan
Massimo Tusconi
Italy
Srijayaprakash Babu Babu Uppada
USA
Yang Wang
China
Xiaokang Wang
China
Karol Wróblewski
Poland
Fan Wu
China
Wenrui Xie
China
Jianshe Yang
China
Guanjun Yang
China
Yikai Yu
China
Shi-Jun Yue
China
Apostolos Zarros
UK
Jianbin Zhang
China
Jinwei Zhang
UK
Xianbin Zhang
China
Wei Zhao
China
Tao Zheng
China
Lili Zhou
China