1. Department of Biological studies, Faculty of Agriculture, Trakia University, Students’ Campus, 6000 Stara Zagora, Bulgaria
2. Department of Plant and Fungal Diversity and Resources, Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, 23 Acad. G. Bonchev Str., 1113 Sofia, Bulgaria
3. Anthropology of Verbal Traditions Section, Institute of Ethnology and Folklore Studies with the Ethnographic Museum, Bulgarian Academy of Sciences, 6A Moskovska Str., 1000 Sofia, Bulgaria