Okladnikov, A. P. (1977). Petroglify Verkhneĭ Leny. Nauka, Leningradskoe otd-nie.
Lua i Stíl Chicago (17ú heag.)Okladnikov, A. P. Petroglify Verkhneĭ Leny. Leningrad: Nauka, Leningradskoe otd-nie, 1977.
Lua MLA (8ú heag.)Okladnikov, A. P. Petroglify Verkhneĭ Leny. Nauka, Leningradskoe otd-nie, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.