2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/36032We study inhomogeneous multidimensional cosmological models with a higher dimensional space-time manifold under dimensional reduction and show that small inhomogeneous excitations of the scale factors of the internal spaces near minima of effective potentials should be observable as massive scalar particles (gravitational excitons) in the external space-time.3 pages, Latex. To appear in the proceedings of the 8-th Marcel Grossmann Meeting, 22-27 June 1997, Hebrew University, Jerusalem, IsraelGeneral Relativity and Quantum Cosmologytext