1. Z. I. Borevich and I. R. Shafarevitch, Number Theory, Academic Press, New York, 1973.
2. W. S. Burnside and A. W. Panton, The Theory of Equations, 7th ed., vol 1: 1912, vol. 2: 1928, Dover, New York, 1960.
3. On a diophantine equation
4. Diophantine Equations with Special Reference To Elliptic Curves
5. W. Fulton, Algebraic Curves, Benjamin, New York, 1969.