@article{DAN_1964_158_3_a16,
     author = {Yu. B. Lifshits and O. S. Ryzhov},
     title = {Passage over sound velocity in {Laval's} nozzles with a circular cross-section},
     journal = {Doklady Akademii Nauk},
     pages = {562--565},
     publisher = {mathdoc},
     volume = {158},
     number = {3},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_158_3_a16/}
}