TY - CPAPER AU - D. Proga AU - A. MacFadyen AU - Phillip Armitage AU - Mitchell Begelman BT - AIP CY - Sante Fe, New Mexico (USA) DO - 10.1063/1.1810870 PB - AIP PP - Sante Fe, New Mexico (USA) PY - 2004 T2 - AIP TI - MHD Simulations of the Collapsar Model for GRBs ER -