2018UNE-EN 1998-1:2018 Eurocode 8: Design of structures for earthquake resistance - Part 1: General rules, seismic actions and rules for buildings.
2013UNE-EN 1998-1:2011/A1:2013 Eurocode 8: Design of structures for earthquake resistance - Part 1: General rules, seismic actions and rules for buildings
2011UNE-EN 1998-1:2011 Eurocode 8: Design of structures for earthquake resistance - Part 1: General rules, seismic actions and rules for buildings