1. On the stabilization of nonlinear systems
2. A note on the Youla-Bongiorno-Lu condition
3. B. D. O. Anderson, and J. B. Moore ,Optimal Filtering ,Prentice-Hall,Englewood Cliffs, New Jersey,1979 . Cited on page(s)194 , 229
4. M. F. Atiyah, and I. G. MacDonald ,Introduction to Commutative Algebra ,Addison-Wesley,Reading, MA.,1969 . Cited on page(s)283 , 293