1. Some results in linear multiple loop feedback systems;Kuh;Proc. Allerton Conf. on Circuit and System Theory,1963
2. On the theory of linear multi-loop feedback systems;Sandberg;Bell System Tech. J.,1963
3. The return difference matrix in linear networks;Tassny–Tschiassny;Proc. IEE,1953
4. Active Network and Feedback Amplifier Theory;Chen,1979
5. Network Analysis and Feedback Amplifier Design;Bode,1959