@article{RCM_2006_40_1_a2,
     author = {Fadwa S. Abu Muriefah Yann Bugeaud (Universit\'e Louis P},
     title = {The diophantine equation x^2 + c = y^n : a brief overview},
     journal = {Revista colombiana de matematicas},
     pages = {31--37},
     publisher = {mathdoc},
     volume = {40},
     number = {1},
     year = {2006},
     url = {http://geodesic.mathdoc.fr/item/RCM_2006_40_1_a2/}
}