@article{DAN_1963_149_5_a0,
     author = {D. V. Beklemishev},
     title = {Classification of bundles of quadratic forms in three variables},
     journal = {Doklady Akademii Nauk},
     pages = {1007--1010},
     publisher = {mathdoc},
     volume = {149},
     number = {5},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_149_5_a0/}
}