@article{GDZPPN002363135,
title = {A Best Covering Problem.},
journal = {Mathematica Scandinavica},
volume = {77},
year = {1995},
pages = {272-280},
zbl = {0868.46020},
url = {http://dml.mathdoc.fr/item/GDZPPN002363135}
}
Knudsen, F.F.; Seip, K.; Ulanovskii, A.M. A Best Covering Problem.. Mathematica Scandinavica, Tome 77 (1995) pp. 272-280. http://gdmltest.u-ga.fr/item/GDZPPN002363135/