Hawrysz , Judyta, и Hans De Ruiter. 2006. Записки Горного института 167 (2), 335-38. https://pmi.spmi.ru/pmi/article/view/8041.

Hawrysz , Judyta, and Hans De Ruiter. 2006. “Smart Partnership for Higher Education: European Mineral Masters Engineering Course”. Journal of Mining Institute 167 (2), 335-38. https://pmi.spmi.ru/pmi/article/view/8041.