1. R. H. Buchholz, On Triangles with Rational Altitudes, Angle Bisectors and Medians, Ph.D. thesis, Newcastle, 1989.
2. Triangles all of Whose Sides and Medians are Rational;Cole,1991
3. Investigato trianguli in quo distantiae angulorum ab eius centro gravitatis rationaliter exprimantur;Euler;Opera Omnia, Commentationes Arithmeticae,1911
4. Diophantine Equations;Mordell,1969
5. The Arithmetic of Elliptic Curves;Silverman,1986