1. B. Adhikari, Backward perturbation and sensitivity analysis of structured polynomial eigenvalue problem, PhD thesis, IIT Guwahati, Dept. of Mathematics, 2008.
2. Structured backward errors and pseudospectra of structured matrix pencils;Adhikari;SIAM J. Matrix Anal. Appl.,2009
3. A new family of companion forms of polynomial matrices;Antoniou;Electron. J. Linear Algebra,2004
4. Algebra;Artin,1991
5. Minimal factorization of matrix and operator functions;Bart,1979