Observation of interaction dynamics in finite-temperature Bose condensed atom cloudsB. D. Busch, Chien Liu, Z. Dutton, C. H. Behroozi and L. Vestergaard HauEurophys. Lett., 51 5 (2000) 485-491DOI: https://doi.org/10.1209/epl/i2000-00363-0