@article{JungnickelStorme2001,
  author    = {Dieter Jungnickel and Leo Storme},
  title     = {Packing and covering groups with subgroups},
  journal   = {Journal of Algebra},
  volume    = {239},
  number    = {1},
  pages     = {191 -- 214},
  doi       = {10.1006/jabr.2000.8640},
  year      = {2001},
}