@article{10_37236_4373,
     author = {Vida Dujmovi\'c and Pat Morin},
     title = {On obstacle numbers},
     journal = {The electronic journal of combinatorics},
     year = {2015},
     volume = {22},
     number = {3},
     doi = {10.37236/4373},
     zbl = {1325.05093},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/4373/}
}