TY - JOUR AU - Jin, D AU - Ensher, J AU - Matthews, M AU - Wieman, C AU - Cornell, Eric C2 - Physical Review Letters DA - 1996-01-01 00:01:00 LA - en M1 - 77 PB - Physical Review Letters PY - 1996 TI - Collective excitations of a Bose-Einstein condensate in a dilute gas ER -