BikbulatovI. Kh. and SobolevA. V., Protective casing for pipes. Promising materials, technologies, and designs. Symposium of Scientific Proceedings, SAA, Krasnoyarsk, 1998, No. 4, pp. 278–281
3.
PanovA. K., Russian Patent 2134640, MKI3 6B 29 C 47/20. Extruder head for manufacture of polymer casings for framing of pipes. No. 98103807/25. Appl. 24.2.98. Publ. 20.8.99
4.
MekhlisA. N. and PanovA. K., Procedure for calculating dimensions of polymer casing for framing of pipes. Methods of cybernetics of chemical engineering processes. Synthesis and optimisation of technological systems. Symposium of Papers of Scientific Conference, Ufa State Scientific and Technological University, Ufa, 1999, pp. 115–117