1. G. V. Vakhrushev, in Materials on Geomorphology and the Neotectonics of the Urals and Volga Region (Bashkir Branch USSR Acad. Sci., Ufa, 1969), No. 2, pp. 128–137 [in Russian].
2. State Report on the Natural Resources and the Environment State in Bashkortostan in 2010 (Bashkortostan Ministry for Natural Resources and the Environment, Ufa, 2011).
3. State Report on the Natural Resources and the Environment State in Bashkortostan in 2011 (Bashkortostan Ministry for Natural Resources and the Environment, Ufa, 2012).
4. State Report on the Natural Resources and the Environment State in Bashkortostan in 2012 (Bashkortostan Ministry for Natural Resources and the Environment, Ufa, 2013).
5. State Report on the Natural Resources and the Environment State in Bashkortostan in 2013 (Bashkortostan Ministry for Natural Resources and the Environment, Ufa, 2014).