The papers of the workshop are published In the proceedings of “XXXI Congreso de la Sociedad Española de Procesamiento de lenguaje natural”. ISBN: 978-84-608-1989-9
http://gplsi.dlsi.ua.es/sepln15/es/node/64
Proceedings of the workshop have been published in the CEUR Workshop Proceedings digital publication service and are indexed in DBLP.
You can access the volume in the following link:
http://ceur-ws.org/Vol-1445
