@article{IM2_1981_17_2_a9,
     author = {A. N. Tyurin},
     title = {The geometry of singularities of a~generic quadratic form},
     journal = {Izvestiya. Mathematics },
     pages = {413--422},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {1981},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1981_17_2_a9/}
}