@article{10_37236_662,
     author = {Branko Gr\"unbaum and Jonathan Lenchner},
     title = {Omittable planes},
     journal = {The electronic journal of combinatorics},
     year = {2011},
     volume = {18},
     number = {1},
     doi = {10.37236/662},
     zbl = {1230.52032},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/662/}
}