Lukin А. Е., and Sаmоylеnко I. I. “On Dispersed Native Metal Particles in Black Shales of the Euxinic Type - Megatraps of Natural Gas”. Reports of the National Academy of Sciences of Ukraine, no. 6 (February 26, 2025): 92–99. Accessed April 28, 2025. https://nasu-periodicals.org.ua/index.php/dp/article/view/16548.