Akhiezer, 1965, The Classical Moment Problem and Some Related Questions in Analysis
Berg, 2014, On the order of indeterminate moment problems, Adv. Math., 250, 105, 10.1016/j.aim.2013.09.020
Berg, 2017, Symmetric moment problems and a conjecture of Valent, Sb. Math., 208, 335, 10.1070/SM8732
Berg, 1994, The Nevanlinna parametrization for some indeterminate Stieltjes moment problems associated with birth and death processes, Methods Appl. Anal., 1, 169, 10.4310/MAA.1994.v1.n2.a3
Gilewicz, 2005, New Nevanlinna matrices for orthogonal polynomials related to cubic birth and death processes, J. Comput. Appl. Math., 178, 235, 10.1016/j.cam.2004.05.025
Koekoek, 2010, Hypergeometric Orthogonal Polynomials and Their q-Analogues. With a Foreword by H. Tom Koornwinder
Romanov, 2017, Order problem for canonical systems and a conjecture of Valent, Trans. Amer. Math. Soc., 369, 1061, 10.1090/tran6686
Valent, 1999, Indeterminate moment problems and a conjecture on the growth of the entire functions in the Nevanlinna parametrization, vol. 131, 227