GRIGOROVA, V.; SOTIROVA, K.; NAOUMOVA, V.; SAMEVA, A.; DOBREVA, M.; IVANOVA, K.; STANCHEV, P. Digitization of Old Mathematical Periodicals Published by the Institute of Mathematics and Informatics, Bulgarian Academy of Sciences. Digital Presentation and Preservation of Cultural and Scientific Heritage, [S. l.], v. 2, p. 222–227, 2012. DOI: 10.55630/dipp.2012.2.21. Disponível em: https://dipp.math.bas.bg/dipp/article/view/dipp.2012.2.21. Acesso em: 28 may. 2024.