@article{TRSPY_2015_288_a15,
     author = {K\'aroly Bezdek and Zsolt L\'angi},
     title = {Density bounds for outer parallel domains of unit ball packings},
     journal = {Informatics and Automation},
     pages = {230--247},
     publisher = {mathdoc},
     volume = {288},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_2015_288_a15/}
}