REFERENCES
- E. H. Lockwood, A Book of Curves. Cambridge University Press, Cambridge, 1961.
- D. Pedoe, The ellipse as an hypotrochoid, Math. Mag. 48 (1975) 228–230.
- R. A. Proctor, A Treatise on the Cycloid and all Forms of Cycloid Curves. Longmans, Green, London, 1878.