Aksenov V.V., Efremenkov A.B., Blashchuk M.Yu., Timofeyev V.Y. Requirements to main systems of geohod. Vestnik Kuzbasskogo gosudarstvennogo tekhnicheskogo universiteta=Bulletin of the Kuzbass State Technical University. 2009; 3(73):24-27. (In Russ., abstract in Eng.).