1. Balakrishnan, J.S., Craig, W., Ono, K.: Variations of Lehmer’s conjecture for Ramanujan’s tau-function, J. Number Theory (to appear)
2. Balakrishnan, J.S., Craig, W., Ono, K., Tsai, W.-L.: Variants of Lehmer’s speculation for newforms. (submitted for publication)
3. Barros, C.F.: On the Lebesgue-Nagell equation and related subjects, PhD thesis, University of Warwick, (2010)
4. Bennett, M.A.: Rational approximation to algebraic numbers of small height : the Diophantine equation $$|ax^n-by^n|=1$$. J. Reine Angew. Math. 535, 1–49 (2001)
5. Bennett, M.A., Skinner, C.: Ternary Diophantine equations via Galois representations and modular forms. Can. J. Math. 56(1), 23–54 (2004)