Simon, B. (2010). Szegö's theorem and its descendants: Spectral theory for L2 perturbations of orthogonal polynomials. Princeton University Press.

Simon, Barry. Szegö's Theorem and Its Descendants: Spectral Theory for L2 Perturbations of Orthogonal Polynomials. Princeton, N.J.: Princeton University Press, 2010.

Simon, Barry. Szegö's Theorem and Its Descendants: Spectral Theory for L2 Perturbations of Orthogonal Polynomials. Princeton University Press, 2010.