Authors
Zheni Nanova
University of Shumen, Faculty of Natural Sciences, Department of Biology, Shumen, Bulgaria
Asya Dragoeva
University of Shumen, Faculty of Natural Sciences, Department of Biology, Shumen, Bulgaria
Vanya Koleva
University of Shumen, Faculty of Natural Sciences, Department of Biology, Shumen, Bulgaria
Nesho Chipev
University of Shumen, Faculty of Natural Sciences, Department of Biology, Shumen, Bulgaria
Borislav Georgiev
University of Shumen, Faculty of Natural Sciences, Department of Biology, Shumen, Bulgaria
Irina Yotova
University of Shumen, Faculty of Natural Sciences, Department of Biology, Shumen, Bulgaria
Milen Ivanov
University of Shumen, Faculty of Natural Sciences, Department of Biology, Shumen, Bulgaria