van der Laan, E.; Snel, E.; de Kaenel, E.; Hilgen, F. J.; Krijgsman, W. (2006): No major deglaciation across the Miocene-Pliocene boundary; integrated stratigraphy and astronomical tuning of the Loulja sections (Bou Regreg area, NW Morocco). American Geophysical Union, Washington, DC, United States, Paleoceanography, 21 (3), georefid:2007-061567