Facies and fossil associations of the uppermost Famennian and Toumaisian deposits of the Iz’yayu River section (Tchemyshev Uplift) / D. B. Sobolev, Y. A. Vevel, A. V. Zhuravlev, S. Y. Kamzalakova // Pan-Arctic Palaeozoic Tectonics, Evolution of Basins and Faunas, Syktyvkar, Russia, Juli 12-15, 2000. - Syktyvkar, 2000. - P. 108-111.