Acrostichum, a Pioneering Fern of Floodplain Areas from the Late Oligocene Sariñena Formation of the Iberian Peninsula Moreno-Domínguez, Rafael ; Cascales-Miñana, Borja ; Ferrer, Javier ; Diez, José B. Abstract Publication: PLoS ONE Pub Date: September 2016 DOI: 10.1371/journal.pone.0162334 Bibcode: 2016PLoSO..1162334M