1. Yu.A. Aminov, Differential geometry and topology of curves, Nauka, Moscow, 1987.
2. Yu. Aminov and A. Sym, On Bianchi and Backlund transformations of two-dimensional surfaces in E4, Math. Phys. Anal. Geom. 3 (2000), 75--89.
3. G. Bor, M. Levi, R. Perlin, and S. Tabachnikov, Tire tracks and integrable curve evolution, Int. Math. Res. Not. IMRN 2020 (2020), 2698--2768.
4. W.G. Cady, The circular tractrix, Amer. Math. Monthly 72 (1965), 1065--1071.
5. M.P. do Carmo, Differential geometry of curves and surfaces, Prentice-Hall, Inc., Englewood Cliffs, New Jersey, 1976.