@article{MZM_1995_58_5_a7,
     author = {N. G. Moshchevitin},
     title = {Recurrence of the integral of a~smooth three-frequency conditionally periodic function},
     journal = {Matemati\v{c}eskie zametki},
     pages = {723--735},
     year = {1995},
     volume = {58},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1995_58_5_a7/}
}