Authors
Asya Dragoeva
Department of Biology, Faculty of natural sciences, Konstantin Preslavsky University of Shumen, Shumen, Bulgaria
Ivayla Kuleva
Department of Biology, Faculty of Pharmacy, Professor Paraskev Stoyanov Medical University of Varna, Bulgaria
Teodora Koynova
Department of Biology, Faculty of natural sciences, Konstantin Preslavsky University of Shumen, Shumen, Bulgaria
Nikolay Kolev
Department of Biology, Faculty of natural sciences, Konstantin Preslavsky University of Shumen, Shumen, Bulgaria
Zheni Dimitrova
Department of Biology, Faculty of natural sciences, Konstantin Preslavsky University of Shumen, Shumen, Bulgaria
Vanya Koleva
Department of Biology, Faculty of natural sciences, Konstantin Preslavsky University of Shumen, Shumen, Bulgaria