RÁKOSNÍK, J.; PAVLOV, R. European Digital Mathematics Library. Digital Presentation and Preservation of Cultural and Scientific Heritage, [S. l.], v. 3, p. 25–34, 2013. DOI: 10.55630/dipp.2013.3.2. Disponível em: https://dipp.math.bas.bg/dipp/article/view/dipp.2013.3.2. Acesso em: 7 may. 2024.