Bondar, K. et al. 2018. New data on gas composition of the air in gypsum caves from Podillya and Bukovyna. Visnyk of Taras Shevchenko National University of Kyiv. Geology. 2, 81 (Mar. 2018), 44–48. DOI:https://doi.org/10.17721/1728-2713.81.07.