Digital economy emerging technologies and business innovation : Second International Conference, ICDEc 2017, Sidi Bou Said, Tunisia, May 4–6, 2017 : proceedings - Jallouli, Rim ca. 20./21. Jahrhundert; Zaïane, Osmar R. 1965-; Bach Tobji, Mohamed Anis ca. 20./21. Jh; Srarfi Tabbane, Rym; Nijholt, Anton (Springer, 2017)