Friends of CKH
- Dr Petar Milanovic, President of Serbian National Chapter of IAH
- Dr Neven Kresic, Co-Chair of the Karst Commission of IAH, AMEC, USA
- Dr Ognjen Bonacci, University of Split, Croatia
- Dr Hans Zojer, University of Graz, Austria
- Dr Paul Marinos, Politechnical University of Athens, Greece
- Dr Aleksey Benderev, Bulgarian Academy of Science, Bulgaria
- Dr Branka Trček, University of Maribor, Slovenia
- Dr Romeo Eftimi, ITA, Tirana, Albania
- Dr Francesco Fiorillo, University of Benevento, Italy
- Dr Adrian Iurkiewicz, Bucharest, Romania