In: Proceedings of the Seventh International Conference Digital Presentation and Preservation of Cultural and Scientific Heritage DiPP (7) Institute of Mathematics and Informatics, Bulgarian Academy of Sciences, Sofia, pp. 123-132. ISSN 1314-4006
In: Advances in technology-based education. Toward a knowledge-based society. Proceedings of 2nd international conference on multimedia and information and communication technologies in education. m-ICTE2003. Badajoz, Vol. 2..
In: Proceedings of the Seventh International Conference Digital Presentation and Preservation of Cultural and Scientific Heritage DiPP (7) Institute of Mathematics and Informatics, Bulgarian Academy of Sciences, Sofia, pp. 113-122. ISSN 1314-4006
Presenting Bulgarian Cultural and Historical Sites with Panorama Pictures