@article{10_4153_CMB_2009_046_2,
     author = {Martini, Horst and Spirova, Margarita},
     title = {Covering {Discs} in {Minkowski} {Planes}},
     journal = {Canadian mathematical bulletin},
     pages = {424--434},
     year = {2009},
     volume = {52},
     number = {3},
     doi = {10.4153/CMB-2009-046-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2009-046-2/}
}