Derkach VA, Hassi S, de Snoo H. Operator models associated with Kac subclasses of generalized Nevanlinna functions. MFAT [Internet]. 1999 Mar. 25 [cited 2025 Dec. 18];5(1):65-87. Available from: https://zen.imath.kiev.ua/index.php/mfat/article/view/81