TY - JOUR AU - Li, Tian-Jun AU - Wu, Weiwei TI - Lagrangian spheres, symplectic surfaces and the symplectic mapping class group JO - Geometry & topology PY - 2012 SP - 1121 EP - 1169 VL - 16 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.2140/gt.2012.16.1121/ DO - 10.2140/gt.2012.16.1121 ID - GT_2012_16_2_a10 ER -