.

Stradanchenko , S. G., N. V. Titov, A. A. Privalov, and Yu. V. Turuk. 2010. “Calculation of Supports of Parallel Workings Divided With Yieldable Pillars at Anthracite Seams”. Journal of Mining Institute 185 (April), 152-57. https://pmi.spmi.ru/pmi/article/view/6792.