Y. T. Mamadakov, A. L. Kungurov, and A. A. Tishkin, “THE DUG-OUT BARROW OF BIYKEN CULTURE ON AYRY-TASH-1 MONUMENT IN THE ESTUARIAL ZONE OF URSUL (ALTAI)”, ТиПАИ, vol. 13, no. 1, pp. 7-18, 1.