@article{2728, author = {Saade, Marshall}, title = {A note on some identities equivalent to xy=wz}, journal = {Portugaliae mathematica}, volume = {33}, year = {1974}, pages = {65-67}, zbl = {0273.20042}, mrnumber = {0330323}, language = {en}, url = {http://dml.mathdoc.fr/item/2728} }
Saade, Marshall. A note on some identities equivalent to xy=wz. Portugaliae mathematica, Tome 33 (1974) pp. 65-67. http://gdmltest.u-ga.fr/item/2728/