@article{10_2140_agt_2017_17_1785,
     author = {Kuno, Yusuke},
     title = {A homology-valued invariant for trivalent fatgraph spines},
     journal = {Algebraic and Geometric Topology},
     pages = {1785--1811},
     year = {2017},
     volume = {17},
     number = {3},
     doi = {10.2140/agt.2017.17.1785},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2017.17.1785/}
}