SAPRIKIN, S. M.; AROV, D. Z. Maximal solutions for embedding problem for a Generalized Schur function and optimal dissipative scattering systems with Pontryagin state spaces. Methods of Functional Analysis and Topology, [S. l.], v. 7, n. 4, p. 69–80, 2001. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/167. Acesso em: 18 dec. 2025.