MARKOV, K. On the "triangular" inequality in the theory of two-phase random media. Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 89, p. 159–166, 1997. Disponível em: https://stipendii.uni-sofia.bg/index.php/fmi/article/view/364. Acesso em: 21 nov. 2024.