P. Santanach, P., J. M. Casas, O. Gratacós, F. Sàbat, M. Liesa, J. A. Muñoz, and F. Sàbat. 2011. “Variscan and Alpine structure of the hills of Barcelona: geology in an urban area”. Journal of Iberian Geology 37, nº 2:: 121-36. https://doi.org/10.5209/rev_JIGE.2011.v37.n2.2