Piskorz , M. (2007). Записки Горного института, 170(2), 246-249. извлечено от https://pmi.spmi.ru/pmi/article/view/7763

Piskorz , M. (2007). Problems of the protection of mining terrains in the mining industry of zinc and lead ores. Journal of Mining Institute, 170(2), 246-249. Retrieved from https://pmi.spmi.ru/pmi/article/view/7763