@article{CRMATH_2010__348_15-16_923_0,
     author = {Szepietowski, B{\l}a\.zej},
     title = {On the commutator length of a {Dehn} twist},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {923--926},
     publisher = {Elsevier},
     volume = {348},
     number = {15-16},
     year = {2010},
     doi = {10.1016/j.crma.2010.07.011},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2010.07.011/}
}