@ARTICLE {maps,
title = {Characterizing Sparse Graphs by Map Decompositions},
author = {Haas, Ruth and Lee, Audrey and Streinu, Ileana and Theran, Louis},
journal = {Journal of Combinatorial Mathematics and Combinatorial Computing},
year = {2007},
volume = {62},
note = {\url{http://arxiv.org/abs/0704.3843}},
}