QI, Feng. Some inequalities of the Turán type for confluent hypergeometric functions of the second kind. Studia Universitatis Babeș-Bolyai Mathematica, [S. l.], v. 64, n. 1, p. 63–70, 2019. DOI: 10.24193/subbmath.2019.1.06. Disponível em: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/2205. Acesso em: 5 feb. 2025.