V. A. Achilleos, T. P. Horikis, G. Theocharis, Panayotis G. Kevrekidis, D. J. Frantzeskakis. Excited Bose-Einstein condensates: Quadrupole oscillations and dark solitons. Mathematics and Computers in Simulation, 82(6):946-957, 2012. [doi]
Abstract is missing.