Machado, G., M. Vavrdová, P. E. Fonseca, H. I. Chaminé, and F. T. Rocha. 2011. “Dating and Differentiation of Geological Units in Highly Deformed and Metamorphosed Rocks – Can Palynology Help? Examples from the Ossa-Morena Zone (W Portugal)”. Trabajos De Geología 30 (30). https://reunido.uniovi.es/index.php/TDG/article/view/154.