Kargl , H. (2009). Cutting technology with point attack picks on roadheaders and its challenges. Записки Горного института, 181, 104. извлечено от https://pmi.spmi.ru/pmi/article/view/7040

Kargl , H. (2009). Cutting technology with point attack picks on roadheaders and its challenges. Journal of Mining Institute, 181, 104. Retrieved from https://pmi.spmi.ru/pmi/article/view/7040