@article{DA_2014_21_1_a6,
     author = {I. I. Takhonov},
     title = {On some problems of covering the plane with circles},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {84--102},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_2014_21_1_a6/}
}