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:
| Abel, Markus |
| Abeytia, Anisa |
| Adjei, Joseph Kwame |
| Agarwal, Neetima |
| Aguerre, Carolina |
| Ajisafe, Dickson |
| Alarabiat, Ayman |
| Almashat, Abdulmonem |
| Alsharari, Nizar |
| Alzahrani, Saeed |
| Anand, Ambuj |
| Beltran, Fernando |
| Berne, Dr. Carmen |
| Bhatia, Parul |
| Bhatt, Jignesh |
| Bhattacharya, Suman |
| Boateng, Henry |
| Borri, Nicola |
| Bose, Feler |
| Botelho Junior, Sergio |
| Broughton-Micova, Sally |
| Brown, Michael |
| Calzati, Stefano |
| Carpenter, Marie |
| Chauhan, Sumedha |
| Chen, Lian Kuan |
| Chia, Eng Seng |
| Ching, Michelle Renee |
| Choi, Hanbyul |
| Chopdar, Prasanta |
| Corpakis, Dimitri |
| Curwen, Peter |
| Daim, Tugrul |
| Damij, Nadja |
| Dávila Benavides, Diego |
| De la Ballina Ballina, Francisco Javier |
| Degrande, Thibault |
| Di Francesco, Renaud |
| Dostov, Victor |
| Duch-Brown, Nestor |
| Egala, Sulemana |
| Enli, Gunn |
| Erkut, Burak |
| Forge, Simon |
| García Alonso, Roberto |
| Gerli, Paolo |
| Gillwald, Alison |
| Gladkova , Anna |
| Goyal, Sandeep |
| Gupta, Kriti |
| Hamza, Karim |
| Henten, Anders |
| Hourneaux Junior, Flavio |
| Howell, Bronwyn |
| Illia, Laura |
| Iturrate-Meras, Diana |
| Jackson, Nicole |
| Janowska, Anna |
| Janssen, Marijn |
| Johnsen, Frank |
| Kar, Arpan |
| Kar, Arpan Kumar |
| Karabchuk, Tatiana |
| Kariuki, Paul |
| Kathuria,, Abhishek |
| Katulic, Tihomir |
| Kesko, Dr. Fatima |
| Khanra, Sayantan |
| Knotts, Kevin |
| Layton, Roslyn |
| Lubasińska, Małgorzata |
| MacInnes, Ian |
| Maisikeli , Sayyed |
| Markopoulou, Dimitra |
| Maschmeyer, Lennart |
| Matteucci, Nicola |
| Merhi, Mohammad |
| Mira da Silva, Miguel |
| Molina-Castillo, Francisco J. |
| Momtaz, Paul |
| Morgan, Jamie |
| Mueller, Milton |
| Musiał-Karg, Magdalena |
| Nascimento, Ademir |
| Navio-Marco, Julio |
| Nikiforova, Anastasija |
| Nikou, Shahrokh |
| Nshimbi, Christopher |
| Nucciarelli, Alberto |
| Nurmandi, Achmad |
| O'Gorman, Bill |
| Ojo, Adegboyega |
| Pandit, Sushmita |
| Pawluczuk, Alicja |
| Penmetsa, Murali Krishna |
| Potgieter, Petrus |
| Prieger, James |
| Purbokusumo, Yuyun |
| Ranchordas, Sofia |
| Razek, Shahira |
| Rendon Schneir, Juan |
| Romeo, Emilia |
| Rossotto, Carlo |
| Ruiz Gómez, Luis Manuel |
| Rusdiyanto, Dian |
| Sadowski, Bert |
| Safder, Iqra |
| Saghafi, Fatemeh |
| Sanehez, Prof. Berba |
| Schmit, Todd |
| Schnurr, Daniel |
| Sharma, Mahak |
| Shin, Dong-Hee |
| Shukla, Upendra |
| Simon, Jean Paul |
| Singh, Ram |
| Skala, Agnieszka |
| Sousa, Cristina |
| Stendal, Karen |
| Sullivan, John L |
| Sutherland, Ewan |
| Syvertsen, Trine |
| Taher, Sheikh |
| Talirongan, Florence Jean |
| Turk, Tomaz |
| Valarezo-Unda, Ángel |
| Varela, Erick |
| Vialle, Pierre |
| Vignieri, Vincenzo |
| Walker, Christopher |
| Whalley, Jason |
| Winter, Jenifer |
| Wolff, Josephine |
| Worden, David |
| Xiangming, Li |
| Zanoni, Patrizia |