Digital Economy. Emerging Technologies and Business Innovation Second International Conference, ICDEc 2017, Sidi Bou Said, Tunisia, May 4–6, 2017, Proceedings - Jallouli, Rim; Zaïane, Osmar R.; Bach Tobji, Mohamed Anis; Srarfi Tabbane, Rym; Nijholt, Anton (Springer International Publishing : Imprint: Springer, 2017)