TODOROV, V.; APOSTOLOVA, M.; BRANKOVA, E.; ZLATEVA, S.; TENEVA, V.; KHRISTOV, D. Study of the scientific work by quantitative methods: some results on Academician Nikola Obreshkoff’s works. Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 89, p. 117–127, 1997. Disponível em: https://stipendii.uni-sofia.bg/index.php/fmi/article/view/361. Acesso em: 21 nov. 2024.