@article{TMF_1990_85_3_a2,
     author = {R. I. Yamilov},
     title = {Invertible changes of~variables generated {by~B\"acklund} transformations},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {368--375},
     publisher = {mathdoc},
     volume = {85},
     number = {3},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1990_85_3_a2/}
}