@article{INTG_1971_3_a0,
     author = {Ya. P. Blank},
     title = {A certain generalization of {S.~Lie's} problem on translation surfaces},
     journal = {Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara},
     pages = {5--27},
     publisher = {mathdoc},
     volume = {3},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTG_1971_3_a0/}
}