1. F.J.Harris: Proc. IEEE 66, 51–83 (1978)
2. T.S.Huang: IEEE Trans. AU-20, 88–90 (1972))
3. J.H.McClellan: “The Design of Two-Dimensional Digital Filters by Transformations”, in Proc. 7th Ann. Princeton Conf. Information Sciences and Systems (1973) pp. 247–251
4. W.F.G.Mecklenbräuker, R.M.Mersereau: IEEE Trans. CAS-23, 414–422 (1976)
5. R.M.Mersereau, W.F.G.Mecklenbrduker, T.F.Quatieri,Jr.: IEEE Trans. CAS-23, 405–414 (1976)