TY - JOUR AU - A. Libgober TI - Factors of Jacobians and isotrivial elliptic surfaces JO - Journal of Singularities PY - 2012 SP - 115 EP - 123 VL - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.5427/jsing.2012.5i/ DO - 10.5427/jsing.2012.5i ID - 10_5427_jsing_2012_5i ER -