Arenillas, I. et al. “The Chicxulub impact is synchronous with the planktonic foraminifera mass extinction at the Cretaceous/Paleogene boundary: new evidence from the Moncada section, Cuba”. Geologica Acta, vol.VOL 14, no. 1, pp. 35-51, https://raco.cat/index.php/GeologicaActa/article/view/306494.