@article{MV_1957_9_3-4_a9,
     author = {S. L. Sobolev},
     title = {Funkcional'nye metody v teorii uravnenij v \v{c}astnyh proizvodnyh},
     journal = {Matemati\v{c}ki vesnik},
     pages = {215 },
     publisher = {mathdoc},
     volume = {9},
     number = {3-4},
     year = {1957},
     url = {http://geodesic.mathdoc.fr/item/MV_1957_9_3-4_a9/}
}