The editorial team greatly appreciates the reviewers who have dedicated their considerable time and expertise to the journal’s rigorous editorial process over the past 12 months, regardless of whether the papers are finally published or not. In 2019, a total of 137 papers were published in the journal, with a median time to first decision of 21 days and a median time from submission to publication of 45 days. The editors would like to express their sincere gratitude to the following reviewers for their generous contribution in 2019:
| Abbas, Moazzam | Liu, Chongxin |
| Abramov, Viktor | Loperfido, Nicola |
| Ahmad, Bashir | Loth, Peter |
| Akram, Muhammad | Ludu, Andrei |
| Ali, Mumtaz | Lukacs, Gábor |
| Andrianov, Igor | Luo, Min-Jie |
| Angeloni, Laura | Ma, Wenxiu |
| Argyros, Ioannis | Ma, Lijia |
| Arrighi, Pablo | Machado, Tenreiro |
| Avery, Richard | Mainardi, Francesco |
| Babiarz, Artur | Malinowski, Marek T. |
| Balazs, Peter | Mantellini, Ilaria |
| Baleanu, Dumitru | Marcellan, Francisco |
| Baranovskii, Evgenii S. | Marcellini, Paolo |
| Baskonus, Haci Mehmet | Marek-Crnjac, Leila |
| Bayad, Abdelmejid | Marin, Marin |
| Belova, Olga | Masulovic, Dragan |
| Bergstra, Jan Aldert | Mateljevic, Miodrag |
| Biler, Piotr | Matos, José |
| Bisi, Marzia | Mendel, Jerry M. |
| Bohaienko, Vsevolod | Mezei, József |
| Bojowald, Martin | Mihai Bica, Alexandru |
| Boyadzhiev, Khristo N. | Minculete, Nicuşor |
| Brenner, Joseph E. | Mohamed-Seghir, Mostefa |
| Bucur, Amelia | Morarescu, Irinel-Constantin |
| Butusov, Denis | Morawiec, Janusz |
| Cabral, João M. G. | Nag, Kaustuv |
| Cakic, Nenad | Naidu, Desineni Subbaram |
| Calin, Ovidiu | Nave, OPhir |
| Campoamor-Stursberg, Rutwig | Nepomuceno, Erivelton Geraldo |
| Cao, Jian | Nguyen-Thanh, Nhon |
| Castro Manzano, Jose Martin | Niculescu, Constantin P. |
| Cerna, David | Nieto, Juan |
| Cerna, Dana | Nikolaev, Igor |
| Cesarano, Clemente | Ning, Jinqiang |
| Chaudhry, Muhammad Umar | Nowakowski, Bernard |
| Chellamuthu, Vinodh | Nuray, Fatih |
| Chen, Chi-Chung | Okeke, Godwin Amechi |
| Chen, Yi Chou | Ostaszewski, Adam |
| Chen, Jeng-Tzong | Otrocol, Diana |
| Cheng, Qiang | Pambuccian, Victor V. |
| Chifu, Ioan Cristian | Pamucar, Dragan |
| Chih, Mingchang | Park, C. |
| Cho, Seonghoon | Park, Jin-Woo |
| Cho, Sun Young | Pascu, Anca Christine |
| Chokri, Ogabi | Patriciu, Alina-Mihaela |
| Chu, Yu-Ming | Pavlovic, Mirjana |
| Cieslinski, Jan L. | Pejic Bach, Mirjana |
| Colhon, Mihaela | Penazzi, Davide |
| Concezzi, Moreno | Perraudin, Nathanael |
| Cordeiro, Welington | Petritis, Dimitri |
| Cordero, Alicia | Petrukhin, Yaroslav |
| Cortes Lopez, Juan Carlos | Petrusel, Adrian |
| Costa, Edgar | Pickett, Maria |
| Costabile, Francesco Aldo | Pinheiro, Mario |
| Crespo, Rubén González | Pinoli, Jean-Charles |
| Cristea, Irina | Pitea, Ariana |
| Crutcher, Sihon H. | Platania, Alessia |
| Cuchta, Tom | Pokorny, Milan |
| Cui, Xiaohui | Ponce, Enrique |
| Czelakowski, Janusz | Popescu, Ovidiu |
| Czerwik, Stefan | Pospisil, Michal |
| Dai, Chao-Qing | Postolache, Mihai |
| Dao, Son Duy | Povstenko, Yuriy |
| Dassios, Ioannis | Pramanik, Tanumoy |
| Dattoli, Giuseppe | Prazmowska, Małgorzata |
| Davoudi, Fatemeh | Prazmowski, Krzysztof |
| De La Madrid, Rafael | Precup, Radu-Emil |
| De la Sen, Manuel | Proca, Alexandrina Maria |
| De Micheli, Enrico | Prykarpatski, Anatolij K. |
| De Swart, Harrie | Pulcini, Gabriele |
| Demidenko, Gennadii | Qian, Wuyong |
| Deng, Yong | Radenovic, Stojan |
| Di Molfetta, Giuseppe | Radojevic, Slobodan |
| Ding, Jiachen | Rakic, Dusan |
| Dosenovic, Tatjana | Rau, A. Ravi P. |
| Dragon, Norbert | Reichhardt, Charles |
| Dress, Andreas | Remm, Elisabeth |
| Du, Wei-Shih | Rezig, Sadok |
| Dunkl, Charles | Richa, Tambi |
| Elhoseny, Mohamed | Rodriguez–Lopez, Jorge |
| Elmouki, Ilias | Roventa, Ionel |
| El-Nabulsi, Rami Ahmad | Rybakov, Vladimir |
| Eremeev, Victor | Sabin, Carlos |
| Erhardt, André H. | Sabirov, Denis |
| Ferrando, Juan Carlos | Salo, Ville |
| Ferrara, Massimiliano | Samaras, Nikolaos |
| Fidaleo, Francesco | Sanchez-Soto, Luis |
| Figueroa, Juan Carlos | Sandberg, Thomas Olof |
| Foniok, Jan | Sandor, Bulcsú |
| Forstneric, Franc | Sawa, Koji |
| Franzoni, Valentina | Sawerwain, Marek |
| Fulga, Andreea | Schlosser, Michael |
| Furferi, Rocco | Serajian, Reza |
| Gabriela, Cristescu | Shackel, Nicholas |
| Gabrielyan, Saak | Shang, Yilun |
| Gallegos, Javier | Sharifov, Yagub |
| Gao, Wei | Shekaramiz, Mohammad |
| Gao, Yuelin | Shen, Zhongmin |
| Garcia, Antonio G. | Sheng, Yu-Bo |
| Garcia-Martínez, Xabier | Shi, Fu-Gui |
| Germano, Guido | Shin, Dong Yun |
| Ghaani Farashahi, Arash | Shipman, Patrick D. |
| Giannakis, Konstantinos | Shipman, Stephen |
| Gigante, Nicola | Shoham, Moshe |
| Gismatullin, Jakub | Shushi, Tomer |
| Gong, Zengtai | Simoes, Alberto |
| Gonzalez Crespo, Ruben | Sinclair, Robert |
| Gonzalez-Parra, Gilberto | Smolentsev, Nikolay |
| Groote, Stefan | Sorrosal-Forradellas, Maria Teresa |
| Gutik, Oleg | Sproessig, Wolfgang |
| Habuda-Stanic, Mirna | Srivastava, H. M. |
| Haubold, Hans | Stacho, Laszlo |
| He, Ji-Huan | Stampach, František |
| He, Fei | Stevic, Željko |
| He, Li | Su, Housheng |
| Hennessy, Matthew G. | Szekelyhidi, László |
| Hildmann, Hanno | Thiery, Nicolas M. |
| Hirayama, Hiroyuki | Tomasiello, Stefania |
| Holighaus, Nicki | Tomescu, Ioan |
| Hong, Wei-Chiang | Toporensky, Aleksey |
| Hoskova-Mayerova, Sarka | Tranchini, Luca |
| Howk, Cory | Trapani, Camillo |
| Hrdina, Jaroslav | Treanta, Savin |
| Hristova, Snezhana | Tsekhan, Olga |
| Ibrahim, Rabha W. | Tuboly, Ádám |
| Ingber, Lester | Turfus, Colin |
| Ionescu, Alexandru-Codrin | Tutueva, Aleksandra |
| Ivanov, Ivan Ganchev | Ullrich, Torsten |
| Jafari, Saeid | Urchs, Max |
| Jafari, Raheleh | Vajiac, Adrian |
| Jahangiri, Jay | Valero, Sergio |
| Jiang, Lining | Vartziotis, Dimitris |
| Jorgensen, Palle E.T. | Vergara, José David |
| Julian-Iranzo, Pascual | Vesely, Michal |
| Kachalov, Vasiliy | Vespri, Vincenzo |
| Kagalovsky, Victor | Vieru, Dumitru |
| Kanamori, Takafumi | Vigo-Aguiar, Jesús |
| Kang, Jungsoo | Villamizar-Roa, Elder J. |
| Karapınar, Erdal | Villanueva, Susana Cubillo |
| Karkanis, Stavros A. | Waclawczyk, Marta |
| Kasprzhitskii, Anton | Wang, Chao |
| Kaulakyte, Kristina | Wang, Huiwen |
| Kausrud, Kyrre | Wang, Ning |
| Kaygorodov, Ivan | Wang, Shaohui |
| Kebiri, Omar | Wang, Yong-Lei |
| Keppens, Dirk | Weber, Eric S. |
| Khakalo, Sergei | Weiss, Ittay |
| Kim, Taekyun | Wen, Kun-Li |
| Korbel, Jan | Wu, Guocheng |
| Kosmala, Witold | Wu, Hsien-Chung |
| Koutsogiannis, Andreas | Xie, Ying |
| Kovacs, Róbert | Xu, Jing |
| Kruchinin, Dmitry | Yang, Paul C.P. |
| Kubiś, Wiesław | Yang, Zhan-Peng |
| Kurina, Galina A. | Yasrab, Robail |
| Kurina, Galina | Yazdi, Mohammad |
| Kwon, Namhee | Yin, Shen |
| Lawnik, Marcin | Yoo, Meesue |
| Lee, Sukho | Yuan, Gonglin |
| Lee, Manseob | Zawidzki, Michał |
| Lee, Shyi-Long | Zenil, Hector |
| Lenells, Jonatan | Zese, Riccardo |
| Lenzi, Ervin Kaminski | Zhang, Xiaohong |
| Lewis, Wayne | Zhang, Wenpeng |
| Li, Fengqiang | Zhang, Jun |
| Li, Jian | Zhao, Zhonglong |
| Li, Tongxing | Zheng, Dingwei |
| Li, Wenxue | Zhong, Yiwen |
| Li, Zhiyuan | Zhou, Mi |
| Li, Ming | Zhu, Lingjiong |
| Li, Lingqiang | Zhu, Quanxin |
| Li, Tan | Zhukovsky, Konstantin |
| Libal, Tomer | Zimont, V. L. |
| Liska, Petr | Zlatanov, Boyan |
| Liu, Xiaogang | Zorzi, Mattia |
| Liu, Yuanyuan | Zur, Krzysztof Kamil |
| Liu, Yanqin |
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