Koutsoudis, Anestis, Fotis Arnaoutoglou, and George Pavlidis. 2014. “Passive Markers As a Low-Cost Method of Enriching Cultural Visits on user’s Demand”. Journal of Advanced Computer Science & Technology (JACST) 3 (1): 12-17. https://doi.org/10.14419/jacst.v3i1.1805.