@misc{ZNSL_1972_24_a0,
     title = {Preface},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {5},
     year = {1972},
     volume = {24},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1972_24_a0/}
}