Koutsoudis A, Arnaoutoglou F, Pavlidis G. Passive markers as a low-cost method of enriching cultural visits on user’s demand. JACST [Internet]. 2014 Feb. 24 [cited 2024 Apr. 27];3(1):12-7. Available from: https://sciencepubco.com/index.php/JACST/article/view/1805