Lozynskyi, V. H., V. Medianyk, P. Saik, K. Rysbekov, and M. Demydov. “Multivariance Solutions for Designing New Levels of Coal Mines”. Rudarsko-geološko-Naftni Zbornik, vol. 35, no. 2, Feb. 2020, doi:10.17794/rgn.2020.2.3.