@article{PIM_1994_N_S_55_69_a9,
     author = {S.L. Pevzner},
     title = {Invarianty i {Kanonicheskie} {Uravneniya} {Giperpoverhnosti} {Vtorogo} {Poryadka} v {N-mernom} {Evklidovom} {Prostranstve}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {75 },
     publisher = {mathdoc},
     volume = {_N_S_55},
     number = {69},
     year = {1994},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_1994_N_S_55_69_a9/}
}