@article{IM2_2019_83_5_a4,
     author = {M. A. Korolev and A. V. Ustinov},
     title = {Distribution of rational points on the circle of unit radius},
     journal = {Izvestiya. Mathematics },
     pages = {1008--1049},
     publisher = {mathdoc},
     volume = {83},
     number = {5},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2019_83_5_a4/}
}