@article{VSGTU_2021_25_3_a7,
     author = {A. I. Besportochnyy and A. N. Burmistrov},
     title = {On the place of sonic points in a critical flow},
     journal = {Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences},
     pages = {519--530},
     publisher = {mathdoc},
     volume = {25},
     number = {3},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGTU_2021_25_3_a7/}
}