Colombo, F., O. Riba, S. Reguant, C. Virgili, and L. Rivero. “Anthropostratigraphy: New lithological units of the Quaternary controlled by human activity”. Journal of Iberian Geology, vol. 39, vol. 39, no. 2, 2013, pp. 253-60, doi: https://doi.org/10.5209/rev_JIGE.2013.v39.n2.42500.