@article{RM_1996_51_1_a16,
     author = {Yu. G. Rykov},
     title = {A~variational principle for a~two-dimensional system of equations of gas dynamics without stress},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {162--164},
     publisher = {mathdoc},
     volume = {51},
     number = {1},
     year = {1996},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1996_51_1_a16/}
}