@article{VUU_2013_4_a8,
     author = {P. D. Lebedev and A. A. Uspenskii and V. N. Ushakov},
     title = {Algorithms of the best approximations of the flat sets by the union of circles},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {88--99},
     publisher = {mathdoc},
     number = {4},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VUU_2013_4_a8/}
}