%0 Journal Article %A Matt Ollis %A Devin Willmott %T An extension theorem for terraces. %J The electronic journal of combinatorics %D 2013 %V 20 %N 2 %U http://geodesic.mathdoc.fr/articles/10.37236/2161/ %R 10.37236/2161 %F 10_37236_2161