@article{DCG_1986__1_130989,
     author = {H. Groemer},
     title = {Some {Basic} {Properties} of {Packing} and {Covering} {Constants.}},
     journal = {Discrete & computational geometry},
     pages = {183--193},
     publisher = {mathdoc},
     volume = {1},
     year = {1986},
     zbl = {0599.52006},
     url = {http://geodesic.mathdoc.fr/item/DCG_1986__1_130989/}
}