Evaluation of the creditworthiness of extractive industry companiesRyszard Pukala, Nataliya Vnukova, Tetiana Tokhtamysh, Oleksandr Yaholnytskyi and Kateryna HrankoE3S Web Conf., 168 (2020) 00035DOI: https://doi.org/10.1051/e3sconf/202016800035