Forest Research Institute Sofia, Bulgaria
Institute of Biodiversity and Ecosystem Research Sofia, Bulgaria
Forest Research Institute - BAS Sofia, Bulgaria
Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences Sofia, Bulgaria
Institute of Biological Research - Branch of NIRDBS Cluj-Napoca, Romania
Bulgarian Academy of Sciences Sofia, Bulgaria
University of Plovdiv "Paisii Hilendarski", Bulgaria Plovdiv, Bulgaria
National Museum of Natural History, Sofia Sofia, Bulgaria
National Museum of Natural History Sofia, Bulgaria
Department of Zoology, Institute of Biology and Ecology, Faculty of Science, Pavol Jozef Šafárik University Košice, Slovakia
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