Stan , Gabriela. 2007. Записки Горного института 170 (2), 113-16. https://pmi.spmi.ru/pmi/article/view/7728.

Stan , Gabriela. 2007. "Run in Hole and Cementing of Reinforced Concrete Columns in Large Diameter Holes". Journal of Mining Institute 170 (2), 113-16. https://pmi.spmi.ru/pmi/article/view/7728.