2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/100578We consider quasi-two-dimensional atomic/molecular Bose-Einstein condensates with both contact and dipole-dipole interactions. It is shown that, as a consequence of the dimensional reduction, and within mean-field theory, the condensates do not develop unstable excitation spectra, even when the dipole-dipole interaction completely dominates the contact interaction.4 pages of RevTex4, 3 figures; Rapid Communication in Physical Review A (to be published)Other Condensed MatterQuantum Physicstext