@article{DE_2006_42_1_a9,
     author = {M. V. Neshchadim},
     title = {Characterization of one-dimensional tangent transformations in terms of differential relations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {114--119},
     publisher = {mathdoc},
     volume = {42},
     number = {1},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2006_42_1_a9/}
}