Web Information Systems and Technologies 13th International Conference, WEBIST 2017, Porto, Portugal, April 25-27, 2017, Revised Selected Papers - Majchrzak, Tim A.; Majchrzak, Tim A.; Traverso, Paolo; Traverso, Paolo; Krempels, Karl-Heinz; Krempels, Karl-Heinz; Monfort, Valérie; Monfort, Valérie (Springer International Publishing : Imprint: Springer, 2018)