@article{DE_1991_27_7_a17,
     author = {E. V. Ferapontov},
     title = {Autotransformations with respect to the solution, and hydrodynamic symmetries},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1250--1263},
     year = {1991},
     volume = {27},
     number = {7},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_7_a17/}
}