Innovative Mobile and Internet Services in Ubiquitous Computing Proceedings of the 12th International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing (IMIS-2018) - Barolli, Leonard; Barolli, Leonard; Xhafa, Fatos; Xhafa, Fatos; Javaid, Nadeem; Javaid, Nadeem; Enokido, Tomoya; Enokido, Tomoya (Springer International Publishing : Imprint: Springer, 2019)