Assoc.Prof.Dr. Nadja Ognjanova-Rumenova,
Geological Institute, Bulg. Acad. Sci. phone:(+0359 2)9792228
Assoc.Prof.Dr. Marlena Yaneva,
Geological Institute, Bulg. Acad. Sci. phone:(+0359 2)9792257
Assoc.Prof.Dr. Elena Koleva-Rekalova,
Geological Institute, Bulg. Acad. Sci. phone:(+0359 2)9792257
Dr. Petar Nikolov,
Geological Institute, Bulg. Acad. Sci. phone:(+0359 2)9793665
Gabriel Nikolov,
Geological Institute, Bulg. Acad. Sci. phone:(+0359 2)9793616
Nikolay Nikolov,
Geological Institute, Bulg. Acad. Sci. phone:(+0359 2)9792235
Prof.DSc Mariana Filipova-Marinova,
Museum of Natural History, Varna. phone: (+0359 52)610243