Martín, Alfredo Mederos. “Hugo Obermaier, First Professor of Prehistory at the University of Madrid (1922‑1939) and the Beginning of Stratigraphic Archaeology in Spain: DOI: 10.5281 Zenodo.15005735”. Estudos Arqueológicos De Oeiras, vol. 35, Apr. 2025, p. 355‑422, https://eao.oeiras.pt/index.php/DOC/article/view/431.