1. D. Alpay, Handwritten manuscript, unpublished (in French).
2. A structure theorem for reproducing kernel Pontryagin spaces;Alpay;J. Comput. Appl. Math.,1998
3. D. Alpay, The Schur algorithm, reproducing kernel spaces and system theory, SMF/AMS Texts and Monographs 5, Panorama et Synthèses 6, 1998.
4. extensions of symmetric operators and reproducing kernel spaces I;Alpay,1991
5. Interpolation problems, extensions of symmetric operators and reproducing kernel spaces II;Alpay;Integral Equations Operator Theory,1991