Machado, G., I. Dias da Silva, and P. Almeida. “Palynology, Stratigraphy and Geometry of the Pennsylvanian continental Santa Susana Basin (SW Portugal)”. Journal of Iberian Geology, vol. 38, vol. 38, no. 2, 2012, pp. 429-48, doi: https://doi.org/10.5209/rev_JIGE.2012.v38.n2.40467.