1. Properties of the Qnmatrix in bilinear transformation;Bose;Proc. IEEE,1933
2. Über die Anzahl der Wurzeln einer algebraischer Gleichung in einem Kreise;Cohn;Math. Z,1922
3. The polynomial matrix equation QQc+ RRc= ø with applications to dynamic feedback;Emre;SIAM J. Control a, Optimiz,1980
4. A general property of the transformation matrices associated with n-variable bilinear transformation;Hertz;IEEE Trans. Circuits a. Syst,1934
5. State-variable design methods may produce unstable feedback controllers;Johnson;Int. J. Contr,1979