@article{ZNSL_2004_314_a16,
     author = {A. V. Shutov},
     title = {Derivatives of circle rotations and similarity of orbits},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {272--284},
     publisher = {mathdoc},
     volume = {314},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2004_314_a16/}
}