@article{DE_2004_40_10_a0,
     author = {A. P. Afanas'ev and S. M. Dzyuba},
     title = {Periodic translation operators and quasiperiodic curves},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1299--1304},
     publisher = {mathdoc},
     volume = {40},
     number = {10},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2004_40_10_a0/}
}