Onac, Bogdan P., Jonathan Sumrall, Tudor Tămaş, Ioan Povară, Joe Kearns, Veonica Dârmiceanu, Daniel Veres, and Cristian Lascu. 2009. “The Relationship Between Cave Minerals and H2S - Rich Thermal Waters Along Cerna Valley (SW Romania)”. Acta Carsologica 38 (1). Ljubljana, Slovenija. https://doi.org/10.3986/ac.v38i1.135.