@misc{IM2_1971_5_6_a0,
     title = {Petr {Sergeevich} {Novikov} {(On} the seventieth anniversary of his birth)},
     journal = {Izvestiya. Mathematics},
     pages = {1193--1194},
     year = {1971},
     volume = {5},
     number = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1971_5_6_a0/}
}