1. Minimization of the energy consumption of soil deformation;Spektor;J. Terramechanics,1980
2. Underground pipelaying;Pestov;Izd. Lit. po Stroitelstvu,1964
3. Burying wire and cable obstructions;Milsark;Bell Laboratories Record,1967
4. Putting telephone lines below ground;Vedejs;Bell Laboratories Record,1971
5. Principles of soil-tool interaction;Spektor;J. Terramechanics,1981