Karaivanova, Aneta, Emanouil Atanassov, Todor Gurov, Peter Stanchev, and Georgi Simeonov. “Bulgarian Contribution to the Open Science Services in NI4OS-Europe”. Digital Presentation and Preservation of Cultural and Scientific Heritage 12 (September 7, 2022): 299–306. Accessed April 24, 2024. https://dipp.math.bas.bg/dipp/article/view/dipp.2022.12.29.