1. N. I. Akhiezer, The Classical Moment Problem (Oliver amd Boyd, Edinburgh and London, 1965).
2. B. Simon, Szego’s Theorem and Its Descendants (Princeton University Press, 2010).
3. On 2D discrete Schrödinger operators associated with multiple orthogonal polynomials
4. Discrete integrable systems generated by Hermite-Padé approximants
5. A. I. Aptekarev, M. Derevyagin, H. Miki, and W. V. Assche, SIGMA 12, 054–(30pp) (2016).