C Sgouropoulou, I Voyiatzis, A Koutoumanos, S. Hamdioui, P. Pouyan, M Comte, P Prinetto, G Farulla, C Delgado Kloos, R Crespo Garcia, Standards-based tools and services for building lifelong learning pathways (May 2017), IEEE Global Engineering Education Conference (EDUCON 2017), 25-28 April 2017, Athens, Greece [Conference Proceedings]