@article{SPHM_1994___6_A1_0,
     author = {Ribenboim, Paulo},
     title = {Catalan's {Conjecture}},
     journal = {S\'eminaire de Philosophie et Math\'ematiques},
     pages = {1--11},
     publisher = {\'Ecole Normale Sup\'erieure},
     number = {6},
     year = {1994},
     language = {en},
     url = {http://www.numdam.org/item/SPHM_1994___6_A1_0/}
}