Stewart, Radovesta, and Stanislav Simeonov. “Transformed Into Digital Resources - a New Life for the Cultural Heritage Related Research and Scientific Archives”. Digital Presentation and Preservation of Cultural and Scientific Heritage 9 (September 13, 2019): 205–212. Accessed May 25, 2024. https://dipp.math.bas.bg/dipp/article/view/dipp.2019.9.17.