KOLEV, EMIL; BAICHEVA, TSONKA. Minimal coverings of {0,1,2}n with spheres of radius n. Utilitas Mathematica , [S. l.], v. 103, 2017. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/1221. Acesso em: 7 may. 2026.