Lyganov, A. V. “MALTSEVO IV SITE OF THE LATE BRONZE AGE ON THE TOIMA RIVER IN THE LOWER KAMA REGION”. Arkheologiia Evraziiskikh Stepei (Archaeology of the Eurasian Steppes), no. 5, Oct. 2020, pp. 182-97, doi:10.24852/2587-6112.2020.5.182.197.