en Cohn, J. H. E. (). „On square Fibonacci numbers”. The Journal of the London Mathematical Society. 39: 537–540. doi:10.1112/jlms/s1-39.1.537. MR0163867.
en Cohn, J. H. E. (). „On square Fibonacci numbers”. The Journal of the London Mathematical Society. 39: 537–540. doi:10.1112/jlms/s1-39.1.537. MR0163867.