@article{FPM_2019_22_6_a6,
     author = {E. A. Kudryavtseva and S. A. Podlipaev},
     title = {Superintegrable {Bertrand} magnetic geodesic flows},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {169--182},
     publisher = {mathdoc},
     volume = {22},
     number = {6},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2019_22_6_a6/}
}