Authors
Rossen Tzonev
Department of Ecology and Environmental Protection, Faculty of Biology, Sofia University “St. Kliment Ohridski”, Sofia, Bulgaria
Marius Dimitrov
Department of Dendrology, Faculty of Forestry, Forestry University, Sofia, Bulgaria
Chavdar Gussev
Division of Applied Botany, Department of Botany and Mycology, Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, Sofia, Bulgaria
Vladimir Vulchev
Division of Applied Botany, Department of Botany and Mycology, Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, Sofia, Bulgaria