1. Lapshev, S. I., Borisov, A.N., and Emel’yanov, S.G., Geometricheskaya teoriya formirovaniya poverkhnostei rekushchimi instrumentami (Geometric Theory of Surface Shaping by Cutting Tools), Kursk: Kursk. GTU, 1997.
2. Russian Registration Certificate 2006613368 for a Computer Program, 2006.