@article{MT_1987_9_a2,
     author = {Yu. A. Aminov},
     title = {Closed curves that are trigonometric polynomials in the arc length},
     journal = {Matemati\v{c}eskie trudy},
     pages = {25--34},
     publisher = {mathdoc},
     volume = {9},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_1987_9_a2/}
}