| 1 | Pogorelov N.E., Reyzenbuk K.E., Pimonov A.G. ruled surface, order of contact, dual vector divergence of conduct, ruled strip. Vestnik Kuzbasskogo gosudarstvennogo tekhnicheskogo universiteta=Bulletin of the Kuzbass State Technical University. 2012; 6(94):118-122. (In Russ., abstract in Eng.). | MORE INFO | DOWNLOAD |
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