Yakubovich, DV, “Real separated algebraic curves, quadrature domains, Ahlfors type functions and operator theory”, Journal of Functional Analysis, 236:1 (2006), 25
Д. В. Якубович, “Линейно-подобная модель Секефальви-Надя–Фояша в области”, Алгебра и анализ, 15:2 (2003), 190–237; D. V. Yakubovich, “Linear-similar Sz.-Nagy–Foias model in a domain”, St. Petersburg Math. J., 15:2 (2004), 289–321
