@article{01533624, title = {Normal all pseudo-Anosov subgroups of mapping class groups.}, journal = {Geometry \& Topology}, volume = {4}, year = {2000}, pages = {293-307}, doi = {10.2140/gt.2000.4.293}, zbl = {0962.57007}, language = {en}, url = {http://dml.mathdoc.fr/item/01533624} }
Whittlesey, Kim. Normal all pseudo-Anosov subgroups of mapping class groups.. Geometry & Topology, Tome 4 (2000) pp. 293-307. doi : 10.2140/gt.2000.4.293. http://gdmltest.u-ga.fr/item/01533624/