Sofia University, Faculty of Biology Sofia, Bulgaria
Sofia University Sofia, Bulgaria
University of Duisburg-Essen Essen, Germany
Meise Botanic Garden Meise, Belgium
German Federal Institute for Risk Assessment Unit Food Hygiene and Technology Berlin, Germany
The Habitat Foundation, The Netherlands Arnhem, Netherlands
Emil Racovitza Institute of Speleology Cluj-Napoca, Romania
retired, former Senior Lecturer in Zoology at Royal Holloway, University of London Egham, United Kingdom
University of Liege Liege, Belgium
Bulgarian Bulgaria
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