カクタスグラフ
(1986), “Topological proof of the Nielsen-Willson theorem”, IEEE Transactions on Circuits and Systems 33 (4): 398–405, doi:10.1109/TCS.1986.1085935
↑ Nishi, Tetsuo; Chua, Leon O. (1986), “Uniqueness of solution for nonlinear resistive circuits containing CCCS’s or VCVS’s whose controlling coefficients are finite”, IEEE Transactions on Circuits and Systems 33 (4): 381–397, doi:10.1109/TCS.1986.1085934
↑ Nishi, Tetsuo (1991), “On the number of solutions of a class of nonlinear resistive circuit”, Proceedings of the IEEE International Symposium on Circuits and Systems, Singapore, pp. 766–769
↑ Paten, Benedict; Diekhans, Mark; Earl, Dent; St.