TY - JOUR AU - B. Morsony AU - D. Lazzati AU - Mitchell Begelman BT - The Astrophysical Journal DA - 11/2010 DO - 10.1088/0004-637X/723/1/267 PY - 2010 SP - 267 EP - 276 T2 - The Astrophysical Journal TI - The Origin and Propagation of Variability in the Outflows of Long-Duration Gamma-Ray Bursts VL - 723 SN - 0004-637X ER -