1. J. Brewer and L. Klingler, Pole assignability and the Invariant Factor Theorem in Prufer domains and Dedekind domains, J. Alg. 111(1987), 536–545.
2. J. Brewer and L. Klingler, Pole shifting for families of systems: the dimension one case, Maths, of Control, Signals, and Systems 1(1988), 285–292.
3. J. Brewer and L. Klingler, Dynamic feedback over rings whose homomorphic images are local-global, to appear in Comm. in Alg.
4. J. Brewer, L. Klingler, and F. Minnaar, Polynomial rings which are bcs—rings, to appear in Comm. in Alg.
5. R. Bumby, E. Sontag, H. Sussmann, and W. Vasconcelos, Remarks on the pole-shifting problem over rings, J. Pure Appl. Alg. 20(1981), 113–127.