Bárd, Edit, and Zsolt László Márkus. “Extending the GUIDE@HAND Tourist Guide Application With QR Codes for Museum Learning”. Digital Presentation and Preservation of Cultural and Scientific Heritage 2 (September 30, 2012): 19–26. Accessed June 21, 2024. https://dipp.math.bas.bg/dipp/article/view/dipp.2012.2.1.