KALINKA, V.; POSTNIKOVA, L. On the distribution of the distorted Euler function. Lithuanian Mathematical Journal, [S. l.], v. 12, n. 3, p. 61–74, 1972. DOI: 10.15388/LMJ.1972.21128. Disponível em: https://www.journals.vu.lt/LMJ/article/view/21128.. Acesso em: 29 apr. 2024.