@article{FPM_2006_12_7_a8,
     author = {M. Marvan and M. Pobo\v{r}il},
     title = {Recursion operator for the intrinsic generalized {sine-Gordon} equation},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {117--128},
     publisher = {mathdoc},
     volume = {12},
     number = {7},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2006_12_7_a8/}
}