@article{DAN_1964_154_5_a13,
     author = {Yu. B. Lifshits and O. S. Ryzhov},
     title = {The causes of shock wave formation in {Laval} nozzles},
     journal = {Doklady Akademii Nauk},
     pages = {1052--1055},
     publisher = {mathdoc},
     volume = {154},
     number = {5},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_154_5_a13/}
}