@article{1077474130, author = {Kasner, Edward and De Cicco, John}, title = {Groups of harmonic transformations}, journal = {Duke Math. J.}, volume = {14}, number = {1}, year = {1947}, pages = { 327-338}, language = {en}, url = {http://dml.mathdoc.fr/item/1077474130} }
Kasner, Edward; De Cicco, John. Groups of harmonic transformations. Duke Math. J., Tome 14 (1947) no. 1, pp. 327-338. http://gdmltest.u-ga.fr/item/1077474130/