TY - JOUR AU - R. Alexander AU - Phillip Armitage BT - The Astrophysical Journal DA - 10/2009 DO - 10.1088/0004-637X/704/2/989 PY - 2009 SP - 989 EP - 1001 T2 - The Astrophysical Journal TI - Giant Planet Migration, Disk Evolution, and the Origin of Transitional Disks VL - 704 SN - 0004-637X ER -