[1]M. Piskorz, PMI, т. 170, вып. 2, сс. 246-249, апр. 2007.

[1]M. Piskorz, "Problems of the Protection of Mining Terrains in the Mining Industry of Zinc and Lead Ores", PMI, vol. 170, no. 2, pp. 246-249, Apr. 2007.