Konstantinov, Oleg, Eugenia Kovatcheva, Valeria Fol, and Roumen Nikolov. 2012. “Discover the Thracians – An Approach for Use of 2D and 3D Technologies for Digitization of Cultural Heritage in the Field of Elearning”. Digital Presentation and Preservation of Cultural and Scientific Heritage 2 (September):167-71. https://doi.org/10.55630/dipp.2012.2.9.