@article{10_2140_agt_2008_8_1647,
     author = {Sato, Masatoshi},
     title = {A class function on the mapping class group of an orientable surface and the {Meyer} cocycle},
     journal = {Algebraic and Geometric Topology},
     pages = {1647--1665},
     year = {2008},
     volume = {8},
     number = {3},
     doi = {10.2140/agt.2008.8.1647},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2008.8.1647/}
}