Analytical evaluation and systematization of technologies for extraction of rare metals from production wasteL. Ya. Shubov, I. G. Doronkina, O. N. Borisova, L. M. Tyger and T. R. LyubetskayaE3S Web Conf., 311 (2021) 09005DOI: https://doi.org/10.1051/e3sconf/202131109005