@article{ELMA_1969__24_140951,
     author = {M.E. Blanpain},
     title = {Sur l'\'equation diophantienne (x2-1)2 + (y2-1)2 = (z2-1)2.},
     journal = {Elemente der Mathematik},
     pages = {134--135},
     publisher = {mathdoc},
     volume = {24},
     year = {1969},
     zbl = {0188.34502},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1969__24_140951/}
}