@article{GDZPPN00207706X,
title = {Sur l'\'equation diophantienne (x2-1)2 + (y2-1)2 = (z2-1)2.},
journal = {Elemente der Mathematik},
volume = {24},
year = {1969},
pages = {134-135},
zbl = {0188.34502},
url = {http://dml.mathdoc.fr/item/GDZPPN00207706X}
}
Blanpain, M.E. Sur l'équation diophantienne (x2-1)2 + (y2-1)2 = (z2-1)2.. Elemente der Mathematik, Tome 24 (1969) pp. 134-135. http://gdmltest.u-ga.fr/item/GDZPPN00207706X/