@article{ZNSL_2019_481_a4,
     author = {A. A. Lodkin},
     title = {Klein sail and {Diophantine} approximation of a vector},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {63--73},
     year = {2019},
     volume = {481},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2019_481_a4/}
}