Authors
Zheni Dimitrova
Department of Biology, Faculty of Natural Sciences, Konstantin Preslavsky University of Shumen, Bulgaria
Asya Dragoeva
Department of Biology, Faculty of Natural Sciences, Konstantin Preslavsky University of Shumen, Bulgaria
Martin Stoyanov
Department of Biology, Faculty of Natural Sciences, Konstantin Preslavsky University of Shumen, Bulgaria
Vanya Koleva
Department of Biology, Faculty of Natural Sciences, Konstantin Preslavsky University of Shumen, Bulgaria