1. J-inner matrix functions, interpolation and inverse problems for canonical systems, I;Arov;Integral Equations Operator Theory,1997
2. On the location of Weyl circles;Atkinson;Proc. Roy. Soc. Edinburgh,1981
3. Inverse Problems in Quantum Scattering Theory;Chadan,1989
4. Theory of Ordinary Differential Equations;Coddington,1955
5. Some Hilbert spaces of entire functions I;de Branges;Trans. Amer. Math. Soc.,1960