DYUKAREV, Yu. M. Nevanlinna–Pick Problem for Stieltjes Matrix Functions. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 56, n. 3, p. 366–380, 2004. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3760. Acesso em: 5 dec. 2025.