TY - JOUR AU - T. Simula AU - P. Engels AU - I. Coddington AU - V. Schweikhard AU - Eric Cornell AU - R. Ballagh BT - Physical Review Letters DA - 2005-03 DO - 10.1103/PhysRevLett.94.080404 PY - 2005 T2 - Physical Review Letters TI - Observations on Sound Propagation in Rapidly Rotating Bose-Einstein Condensates VL - 94 SN - 0031-9007 ER -