1. J. Budelis and N. Abramson, Harvard University Technical Report No. 505, June, 1966.
2. A. Papoulis, New Results in Sampling Theory, Hawaii International Conference on System Sciences, June, 1968.
3. A. Papoulis, Generalized Sampling Expansion, IEEE Trans. Circuits and Systems, Vol. CAS-24, pp. 652–654, Nov., 1977.
4. H.D. Löke, Zeitinvariante Abtast-und PAM-Systeme, Archiv Für Electronik und Übertragungstechnik, Band 31, Heft 11, pp. 441–445, Nov., 1977.
5. J.L. Brown, Jr., Multi-Channel Sampling of Low-Pass Signals, IEEE Transactions on Circuits and Systems, Vol. CAS-28, No. 2, pp. 101–106, Feb., 1981.