Moumoutzis, Nektarios, Yiannis Sifakis, Stavros Christodoulakis, and Desislava Paneva-Marinova. “A Reference Framework to Establish and Sustain Onlife Communities and Its Use: Rich Learning Experiences in History With ViSTPro”. Digital Presentation and Preservation of Cultural and Scientific Heritage 9 (September 13, 2019): 27–42. Accessed June 19, 2024. https://dipp.math.bas.bg/dipp/article/view/dipp.2019.9.2.