PANIGRAHI, T.; PATTNAYAK, E.; EL-ASHWAH, R. M. Third Hankel determinant for the class of analytic functions defined by Mathieu-type series related to a petal-shaped domain. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 76, n. 4, p. 525–532, 2024. DOI: 10.3842/umzh.v74i4.7335. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/7335. Acesso em: 5 dec. 2025.