Alessandro Bozzon Francisco José Domínguez Mayo Joaquim Filipe Proceedings of the 15th International Conference on Web Information Systems and Technologies, WEBIST 2019, Vienna, Austria, September 18-20, 2019. WEBIST ScitePress 2019 978-989-758-386-5 https://doi.org/10.5220/0000126600002366 db/conf/webist/webist2019.html