Developing a Geologically Based VS30 Site-Condition Model for Portugal: Methodology and Assessment of the Performance of Proxies - Vilanova, Susana P.; Narciso, João; Carvalho, João; Lopes, Isabel; Quinta-Ferreira, Mário; Pinto, Carlos C.; Moura, Rui; Borges, José; Nemser, Eliza S. (2018)