@article{GT_2007_11_3_a9,
     author = {Costello, Kevin},
     title = {A dual version of the ribbon graph decomposition of moduli space},
     journal = {Geometry & topology},
     pages = {1637--1652},
     publisher = {mathdoc},
     volume = {11},
     number = {3},
     year = {2007},
     doi = {10.2140/gt.2007.11.1637},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/gt.2007.11.1637/}
}