@article{UFA_2017_9_2_a3,
     author = {V. V. Gorbatsevich},
     title = {On geometry of solutions to approximate equations and their symmetries},
     journal = {Ufa mathematical journal},
     pages = {40--54},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UFA_2017_9_2_a3/}
}