1. N. K. Bose, Multidimensional Systems Theory and Applications, D. Reidel Publishing Company, Dordrecht, Holland, 2004.
2. W. Rudin, Function Theory in Polydiscs, W. A. Benjamin Inc., New York, 1969.
3. I. Yamada, K. Kurosawa, H. Hagesawa, and K. Sakaniwa, “Algebraic phase unwrapping and zero distribution of complex polynomials - characterization of multivariate stable polynomials,” IEEE Trans. Signal Process., vol. 98, no. 6, pp. 1639–1664, 1998.
4. I. Yamada and N.K. Bose, “Algebraic phase unwrapping and zero distribution of polynomials for continuous-time systems,” IEEE Trans. Circuits and Systems: I, vol. 49, no. 3, pp. 298–304, 2002.
5. E. Zerz, Topics in Multidimensional Linear Systems Theory, Lecture Notes in Control and Information Sciences 256. Springer-Verlag London Limited, London, Great Britain, 2000.