Piskorz , Monika. 2007. Записки Горного института 170 (2), 246-49. https://pmi.spmi.ru/pmi/article/view/7763.

Piskorz , Monika. 2007. "Problems of the Protection of Mining Terrains in the Mining Industry of Zinc and Lead Ores". Journal of Mining Institute 170 (2), 246-49. https://pmi.spmi.ru/pmi/article/view/7763.