TY - JOUR AU - Mark Edwards AU - P Ruprecht AU - K Burnett AU - W Clark C2 - Physical Review A (Atomic, Molecular and Optical Physics) DA - 1996-01-01 LA - en M1 - 54 PB - Physical Review A (Atomic, Molecular and Optical Physics) PY - 1996 TI - Finding the Elementary Excitations of Bose-Condensed Neutral Atoms in a Trap ER -