Improving the methods for determining the promising boundaries of iron ore open pitsSerhii Lutsenko, Yulian Hryhoriev, Volodymyr Peregudov, Aidar Kuttybayev and Asel ShampykovaE3S Web Conf., 280 (2021) 01005DOI: https://doi.org/10.1051/e3sconf/202128001005