Authors
Ivayla Kuleva
Department of Biology, Faculty of Pharmacy, Professor Paraskev Stoyanov Medical University of Varna, Varna, Bulgaria
Vanya Koleva
Department of Biology, Faculty of Natural Sciences, Konstantin Preslavsky University of Shumen, Shumen, Bulgaria
Galina Yaneva
Department of Biology, Faculty of Pharmacy, Professor Paraskev Stoyanov Medical University of Varna, Varna, Bulgaria
Mariya Atanasova
Department of Biology, Faculty of Natural Sciences, Konstantin Preslavsky University of Shumen, Shumen, Bulgaria
Arzu Nedretova
Department of Biology, Faculty of Pharmacy, Professor Paraskev Stoyanov Medical University of Varna, Varna, Bulgaria
Asya Dragoeva
Department of Biology, Faculty of Natural Sciences, Konstantin Preslavsky University of Shumen, Shumen, Bulgaria