Solution of the Riemann – Hilbert problem for a holomorphic vector by the Bouligand – Giraud method. Neliniini Kolyvannya, [S. l.], v. 21, n. 4, p. 567–573, 2018. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/931. Acesso em: 21 jan. 2026.