The Friedmann cosmological models revisited as an harmonic motion and new exact solutions

RAFAEL MARÍA RUBIO RUIZ2026-01-292026-01-29201410.1142/S02198878145005092-s2.0-84901340139https://www.scopus.com/inward/record.uri?eid=2-s2.https://ucocris.uco.es/handle/123456789/25410Physics and Astronomy (miscellaneous)The Friedmann cosmological models revisited as an harmonic motion and new exact solutionsresearch article