@article{10_4153_CMB_2000_046_9,
     author = {Bluskov, I. and Greig, M. and Heinrich, K.},
     title = {Infinite {Classes} of {Covering} {Numbers}},
     journal = {Canadian mathematical bulletin},
     pages = {385--396},
     year = {2000},
     volume = {43},
     number = {4},
     doi = {10.4153/CMB-2000-046-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2000-046-9/}
}