Lopes, Ilda, Quinta-Ferreira, Mario. "ENGINEERING GEOLOGY OF FOUR MONDEGO RIVER BRIDGES IN COIMBRA, PORTUGAL." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 16th International Multidisciplinary Scientific GeoConference SGEM2016, Science and Technologies in Geology, Exploration and Mining (2016): 93-100. https://doi.org/10.5593/sgem2016/b13/s02.012