@article{CRMATH_2007__345_8_449_0,
     author = {Broaddus, Nathan and Farb, Benson and Putman, Andrew},
     title = {The {Casson} invariant and the word metric on the {Torelli} group},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {449--452},
     publisher = {Elsevier},
     volume = {345},
     number = {8},
     year = {2007},
     doi = {10.1016/j.crma.2007.09.018},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2007.09.018/}
}