Martín-Closas, Carles et al. «New palaeobotanical data from Carboniferous Culm deposits constrain the age of the Variscan deformation in the eastern Pyrenees». Geologica Acta, 2018, vol.VOL 16, núm. 2, p. 107-23, https://raco.cat/index.php/GeologicaActa/article/view/338406.