Koutsoudis, Anestis, Fotis Arnaoutoglou, and George Pavlidis. “Passive Markers As a Low-Cost Method of Enriching Cultural Visits on user’s Demand”. Journal of Advanced Computer Science & Technology 3, no. 1 (February 24, 2014): 12–17. Accessed April 18, 2025. https://sciencepubco.com/index.php/JACST/article/view/1805.