Gross-Pitaevski equation and resonances in Bose-Einstein condensates J. da Providencia, A. R. Sakhel, F. B. Malik and H. R. Glyde Europhys. Lett., 69 6 (2005) 920-923 Published online: 11 February 2005 DOI: 10.1209/epl/i2004-10445-5