- Bjorn Poonen, Edward F. Schaefer, and Michael Stoll, Twists of X(7) and primitive solutions to x2+y3=z7, Duke Math. J. 137 (2007), no. 1, 103–158.[MR]
- Edward F. Schaefer and Michael Stoll, How to do a p-descent on an elliptic curve, Trans. Amer. Math. Soc. 356 (2004), no. 3, 1209–1231 (electronic).[MR]