1. H. F. Baker, Principles of geometry, Vol. IV, Chapter II; Cambridge Univ. Press, 1925.
2. E. Griffin, Thesis, Harvard Univ., Cambridge, Mass., 1982.
3. Pure and Applied Mathematics;Griffiths, Phillip,1978
4. H. Hilton, Plane algebraic curves, Oxford, 1920.
5. Galois groups of enumerative problems;Harris, Joe;Duke Math. J.,1979