1. Adamjan, V.M., D.Z. Arov, and M.G. Krein (1978). “Infinite block Hankel matrices and related extension problems,” AMS Transl., vol. 111, pp. 133–156.
2. Anderson, B.D.O. (1967). “An algebraic solution to the spectral factorization problem,” IEEE Trans. Auto. Control, vol. AC-12, pp. 410–414.
3. Ball, J.A. and J.W. Helton (1983). “A Beurling-Lax theorem for the Lie group U(m,n) which contains most classical interpolation theory,” J. Op. Theory, vol. 9, pp. 107–142.
4. Boyd, S., V. Balakrishnan, and P. Kabamba (1989). “A bisection method for computing the H ∞ norm of a transfer matrix and related problems,” Math. Control, Signals, and Systems, vol. 2, no. 3, pp. 207–220.
5. Clements, D.J. and K. Glover (1989) “Spectral Factorization via Hermitian Pencils”, to appear Lincar Algebra and its Applications, Linear Systems Special Issue.