Bandura A. І.; SKASKIV, O. B. Directional logarithmic derivative and the distribution of zeros of an entire function of bounded $L$-index in the direction. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 69, n. 3, p. 426–432, 2017. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1706. Acesso em: 5 dec. 2025.