- Francesca BENANTI, University of Palermo, Italy
- Lyubomir BORISOV, IMI - BAS, Sofia, Bulgaria
and Asen BOJILOV, Faculty of Mathematics and Informatics, Sofia University "St. Kliment Ohridski", Bulgaria
- Victor BOVDI, Department of Mathematical Sciences, UAE University - Al-Ain, United Arab Emirates
- Peter BOYVALENKOV, IMI - BAS, Sofia, Bulgaria
and Maya STOYANOVA, Faculty of Mathematics and Informatics, Sofia University "St. Kliment Ohridski", Bulgaria
- Ivan CHIPCHAKOV, IMI - BAS, Sofia, Bulgaria
- Kálmán CZISZTER, Alfréd Rényi Institute of Mathematics, Hungarian Academy of Sciences, Budapest, Hungary
- Ofir DAVID, Department of Mathematics, Technion - Israel Institute of Technology, Haifa, Israel
- Onofrio Mario DI VINCENZO, Universitŕ degli Studi della Basilicata, Potenza, Italy
- Şehmus FINDIK, Çukurova University, Adana, Turkey
- Olga FINOGENOVA, Ural Federal University, Yekaterinburg, Russia
- Be'eri GREENFELD, Bar - Ilan University, Ramat Gan, Israel
- Geoffrey JANSSENS, Vrije Universiteit Brussel, Belgium
- Yakov KARASIK, Department of Mathematics, Technion - Israel Institute of Technology, Haifa, Israel
- Plamen KOEV, San José State University, USA
- Boyan KOSTADINOV, Sofia, Bulgaria
- Daniela LA MATTINA, University of Palermo, Italy
- Todor POPOV, Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia, Bulgaria
- Tsetska RASHKOVA, University of Ruse "Angel Kanchev", Bulgaria
- Jordan SAHATTCHIEVE, Sofia, Bulgaria
- Thomas SICKING, Mathematisches Institut, Georg-August-Universität Göttingen, Germany
- Špela ŠPENKO, Institute of Mathematics, Physics and Mechanics, Ljubljana, Slovenia
- Konstantin TABAKOV, Faculty of Mathematics and Informatics, Sofia University "St. Kliment Ohridski", Bulgaria
- Tatyana TODOROVA, Faculty of Mathematics and Informatics, Sofia University "St. Kliment Ohridski", Bulgaria
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