@article{10_37236_1047,
     author = {Sarang Aravamuthan and Sachin Lodha},
     title = {Covering codes for {Hats-on-a-line}},
     journal = {The electronic journal of combinatorics},
     year = {2006},
     volume = {13},
     doi = {10.37236/1047},
     zbl = {1132.91008},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1047/}
}