PETROV, V. V. On an inequality for concentration functions. Lithuanian Mathematical Journal, [S. l.], v. 3, n. 1, p. 195–197, 1963. DOI: 10.15388/LMJ.1963.19421. Disponível em: https://www.zurnalai.vu.lt/LMJ/article/view/19421. Acesso em: 3 may. 2025.