@article{DAN_1960_132_4_a14,
     author = {F. I. Frankl'},
     title = {Existence of a weak solution to the direct problem in the theory of sonic flow past a profile in first approximation},
     journal = {Doklady Akademii Nauk},
     pages = {789--792},
     publisher = {mathdoc},
     volume = {132},
     number = {4},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1960_132_4_a14/}
}