1. On the theory of canonical differential operators in Hilbert space;Adamjan;Dokl. Akad. Nauk SSSR,1968
2. D. Alpay, Reproducing kernel Kreı̆n spaces of analytic functions and inverse scattering, Ph.D. Thesis, Weizmann Institute of Sciences, Rehovot, Israel, 1986.
3. Hilbert spaces of analytic functions, inverse scattering and operator models, I;Alpay;Integral Equations Operator Theory,1984
4. Hilbert spaces of analytic functions, inverse scattering and operator models, II;Alpay;Integral Equations Operator Theory,1985
5. Inverse spectral problem for differential operators with rational scattering matrix functions;Alpay;J. Differential Equations,1995