Fleser , A. (2006). Записки Горного института, 167(2), 319-321. извлечено от https://pmi.spmi.ru/pmi/article/view/8037

Fleser , A. (2006). The impact of restructuring in the mining industry on the labor in the jiu valley coal basin. Journal of Mining Institute, 167(2), 319-321. Retrieved from https://pmi.spmi.ru/pmi/article/view/8037