KUMAR, S. Sivaprasad; YADAV, Pooja. On applications of the extended Jack’s lemma. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 77, n. 6, p. 449–450, 2025. DOI: 10.3842/umzh.v77i6.8419. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8419. Acesso em: 5 dec. 2025.