API mashups: How well do they support the travellers' information needs? - Bill Karakostas; Zannis Kalamboukis (ANT/SEIT, 2017)

Service availability analysis of a multimodal travel planner using Stochastic Automata. - Spyridon C. Evangelatos; Zannis Kalampoukis; Ioanna Fergadioti; Stelios Christofi; Bill Karakostas; Yannis Zorgios (ISCC, 2017)