@article{ZNSL_1969_14_a0,
     author = {O. A. Ladyzhenskaya},
     title = {Preface of the {Editor}},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {7},
     publisher = {mathdoc},
     volume = {14},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1969_14_a0/}
}