1. Y. Bilu, G. Hanrot and P. M. Voutier (with an appendix by M. Mignotte), Existence of primitive divisors of Lucas and Lehmer numbers. J. Reine Angew. Math. 539, 75–122 (2001)
2. Y. Bugeaud, T.N. Shorey, On the number of solutions of the generalized Ramanujan–Nagell equation. J. Reine Angew. Math. 539, 55–74 (2001)
3. J.H.E. Cohn, On square Fibonacci numbers. J. Lond. Math. Soc. 39(4), 537–540 (1964)
4. L.K. Hua, Introduction to Number Theory (Springer, Berlin, 1982)
5. M.H. Le, Some exponential diophantine equations I: the equation
$$D_1x^2-D_2y^2=\lambda k^z$$
D
1
x
2
-
D
2
y
2
=
λ
k
z
. J. Number. Theory 55(2), 209–221 (1995)