TY - JOUR AU - B. Seaman AU - L. Carr AU - Murray Holland BT - Physical Review A DA - 2005-09 DO - 10.1103/PhysRevA.72.033602 PY - 2005 T2 - Physical Review A TI - Period doubling, two-color lattices, and the growth of swallowtails in Bose-Einstein condensates VL - 72 SN - 1050-2947 ER -