@misc{RCM_2009_43_1_a5, title = {Perfect powers in solutions to {Pell} equations}, journal = {Revista colombiana de matematicas}, pages = {71--86}, publisher = {mathdoc}, volume = {43}, number = {1}, year = {2009}, url = {http://geodesic.mathdoc.fr/item/RCM_2009_43_1_a5/} }