Mechanism of vortices generation for a trapped superfluid under oscillatory excitation - Tavares, Pedro Ernesto Schiavinatti; Telles, Gustavo; Shiozaki, Rodrigo F.; Castelo Branco, Cora C.; Farias, Kilvia Mayre; Bagnato, Vanderlei Salvador (Latin America Optics and Photonics Conference - LAOP, 2012)