@article{TM_1971_116_a1,
     author = {O. A. Ladyzhenskaya},
     title = {Preface},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {5--6},
     publisher = {mathdoc},
     volume = {116},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1971_116_a1/}
}