@article{DAN_1983_269_6_a8,
     author = {S. S. Ryshkov and S. Sh. Shushbaev},
     title = {Positive forms of degree $2l>2$ and zeta-separating quadratic forms},
     journal = {Doklady Akademii Nauk},
     pages = {1316--1319},
     publisher = {mathdoc},
     volume = {269},
     number = {6},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1983_269_6_a8/}
}