@article{10_37236_2161,
     author = {Matt Ollis and Devin Willmott},
     title = {An extension theorem for terraces.},
     journal = {The electronic journal of combinatorics},
     year = {2013},
     volume = {20},
     number = {2},
     doi = {10.37236/2161},
     zbl = {1293.20023},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/2161/}
}