Znojek , Marta. 2007. Записки Горного института 170 (2), 194-96. https://pmi.spmi.ru/pmi/article/view/7748.

Znojek , Marta. 2007. “Position of HR Department in the Company of the 21 Century”. Journal of Mining Institute 170 (2), 194-96. https://pmi.spmi.ru/pmi/article/view/7748.