1. Bishop, L.R. (1975). There is a more than one way to frame a curve, Amer. Math. Monthly. Vol 82, Issue 3, 246-251.
2. Hanson, A. J. and Ma, H.H. (1995). Parallel Transport Approach to Curve Framing, Tech. Math. Rep. 425, Indiana University Computer Science Department.
3. Gray, A. (1996). Modern Differential Geometry of Curves and Surfaces with Mathematica, CRC Press, Inc.
4. Lipschutz, M. (1969). Schaum's Outline of Differential Geometry, Schaum's Outlines.
5. Lucas, P., Ortega-Yagües, J.A. (2012). Bertrand curves in the three-dimensional sphere, Journal of Geometry and Physics, 62, 1903-1914.