1.作者： Bitmead RR, Gevers MR, Petersen IR, Kaye RJ
题名：Monotonicity and stability properties of solutions of the Riccati difference equation: Propositions, lemmas, theorems, fallacious conjectures and counterexamples,
来源：Systems Control Lett , 5(1985) :309–315
相关链接：http://www.sciencedirect.com/science/article/pii/0167691185900271