Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1994_336_6_a1, author = {I. M. Gel'fand and M. I. Graev and V. S. Retakh and S. A. Spirin}, title = {$(r,s)$-exponentials}, journal = {Doklady Akademii Nauk}, pages = {730--732}, publisher = {mathdoc}, volume = {336}, number = {6}, year = {1994}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1994_336_6_a1/} }
I. M. Gel'fand; M. I. Graev; V. S. Retakh; S. A. Spirin. $(r,s)$-exponentials. Doklady Akademii Nauk, Tome 336 (1994) no. 6, pp. 730-732. http://geodesic.mathdoc.fr/item/DAN_1994_336_6_a1/