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 (The Mining-Geological-Petroleum Bulletin), vol. 35, no. 2, Feb. 2020, https://hrcak.srce.hr/ojs/index.php/rgn/article/view/10236.