Overview of the stratigraphy and initial quantitative biogeographical results from the Devonian of the Albergaria-a-Velha Unit (Ossa-Morena Zone, W. Portugal) Gil Machado , Milada Vavrdová , Paulo Emanuel Fonseca , Helder Chaminé , Francisco Tavares Rocha 2008 | volume 64 | issue 2-4 | pages 109–113 PDF
