Skipetrov, E. P.; Konstantinov, N. S.; Bogdanov, E. V.; Knotko, A. V.; Slynko, V. E. Resonant Impurity Level of Ni in the Valence Band of Pb_1–xSn_xTe Alloys. Fiz. Nizk. Temp. 2020, 47, 29-37.