1. Administration of the Northern Sea Route. (2018). Statistic Data. Retrieved February 3, 2018, from http://www.nsra.ru/
2. Research of Influence of the Detail of Hydrographic Surveys on Assessment of Depths through Passage. Vestnik gosudarstvennogo universiteta morskogo i rechnogo flota imeni admirala S.O.;A.Afonin;Makarova,2017
3. Investigation of the Ice Capacities of “Saint Petersburg” Icebreaker in the Kara Sea.;E.Appolonov;Shipbuilding,2011
4. Arctic and Antarctic Research Institute. (2018). Generalized Maps of the State of the Ice Cover in the Arctic and Freezing Seas of Russia and the Greenland Sea. Retrieved September 25, 2018, from http://www.aari.ru/odata/_d0004.php?mod=0&m=Kar