Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1970_7_a9, author = {S. L. Pevzner}, title = {Invariants of a~pair of real quadratic forms}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {83--91}, publisher = {mathdoc}, number = {7}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1970_7_a9/} }
S. L. Pevzner. Invariants of a~pair of real quadratic forms. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 7 (1970), pp. 83-91. http://geodesic.mathdoc.fr/item/IVM_1970_7_a9/