1. Stability of Multi-dimensional Scalar and Matrix Polynomials;Jury;Proc. of IEEE,1978
2. Design of Separable Denominator 2-Dimensional Digital Filter Possessing Real Circular Symmetric Frequency Responses;Rajan;Proc. of IEE, Pt.G.,1982
3. Design of 2-Dimensional Circular Symmetric Digital Filters;Charalambous;Proc. of IEE, Pt.G,1982
4. Design of Circular Symmetric 2-D Recursive Filters;Costa;IEEE Trans. on Acoustics, Speech and Signal Processing,1976
5. 2-D Recursive Digital Filters With Constant Group-Delay Characteristics Using Separable Denominator Transfer Function and a New Stability Test;Ahmadi;IEEE Trans. on Acoustics, Speech and Signal Processing,1985