1. Krzemień A., Dyszy A. // Записки Горного института. 2007. Том 170№ 2. C. 200-202.

1. Krzemień A., Dyszy A. Occupational health and safety management rules according to pier-merit program in polish coal mines // Journal of Mining Institute. 2007. Том 170№ 2. C. 200-202.