1. Institute of Biology and Ecology, Faculty of Science, P. J. Šafárik University, Mánesova 23, SK-041 54 Košice, Slovak Republic.
2. Department of Biology, Faculty of Natural Sciences and Mathematics, University of Montenegro, Džordža Vašingtona bb, ME-810 00 Podgorica, Montenegro.
3. Vagrinec 18, SK-090 03 Ladomirová, Slovak Republic.
4. Raketova 9/1473, SK-040 12 Košice, Slovak Republic.