1. R. Ackner, H. Lev-Ari, and T. Kailath, The Schur algorithm for matrix-valued meromorphic functions, SIAM J. Math. Anal. 15 (1994), 140–150.
2. V.M. Adamyan and S.E. Nechayev, Nuclear Hankel matrices and orthogonal trigonometric polynomials, Contemporary Mathematics 189 (1995), 1–15.
3. N.I. Akhiezer, On a minimum problem in function theory and the number of roots of an algebraic equation inside the unit disc, Izv. Akad. Nauk SSSR Mat. Estestv. Nauk No. 9 (1930), 1169–1189 (Russian); English translation: Operator Theory: Adv. Appl. 95, Birkhäuser Verlag, Basel, 1997, 19–35.
4. N.I. Akhiezer, The classical moment problem, Hafner, New-York, 1965.
5. D. Alpay, Reproducing kernel Krein spaces of analytic functions and inverse scattering, PhD thesis, Weizmann Institute of Sciences, Rehovot, Israel, 1986.