@article{SEMR_2016_13_a64,
     author = {S. V. Avgustinovich and D. S. Krotov and A. Yu. Vasil'eva},
     title = {Completely regular codes in the infinite hexagonal grid},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {987--1016},
     publisher = {mathdoc},
     volume = {13},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2016_13_a64/}
}