@article{GDZPPN002222396,
title = {Minimal Coverings of Manifolds with Balls.},
journal = {Manuscripta mathematica},
volume = {29},
year = {1979},
pages = {385-416},
zbl = {0415.55001},
url = {http://dml.mathdoc.fr/item/GDZPPN002222396}
}
Singhof, Wilhelm. Minimal Coverings of Manifolds with Balls.. Manuscripta mathematica, Tome 29 (1979) pp. 385-416. http://gdmltest.u-ga.fr/item/GDZPPN002222396/