Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1971_8_a9, author = {S. V. Ovchinnikov}, title = {Positive definite functions on {Chevalley} groups}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {77--87}, publisher = {mathdoc}, number = {8}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1971_8_a9/} }
S. V. Ovchinnikov. Positive definite functions on Chevalley groups. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 8 (1971), pp. 77-87. http://geodesic.mathdoc.fr/item/IVM_1971_8_a9/