MathSciNet bibliographic data MR776000 47B50 (42C05) Kreĭn, Mark G.; Langer, Heinz On some continuation problems which are closely related to the theory of operators in spaces $\Pi\sb \kappa$$\Pi\sb \kappa$. IV. Continuous analogues of orthogonal polynomials on the unit circle with respect to an indefinite weight and related continuation problems for some classes of functions. J. Operator Theory 13 (1985), no. 2, 299–417. Journal

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