Bulgarian Academy of Sciences
National Institute of Archaeology, Bulgarian Academy of Sciences
Institute of Zoology, Bulgarian Academy of Sciences, Sofia, Bulgaria
Institute of Balkan Studies and Centre of Thracology, “Prof. Alexander Fol” Bulgarian Academy of Sciences
Bulgarian Academy of Sciences, Institute for Legal Studies Sofia, Bulgaria 28 Todor Alexandrov Blvd.
Bulgarian Academy of Sciences, Cyrillo-Methodian Research Centre (Sofia, Bulgaria)
Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, Sofia, Bulgaria
