Hoshikawa, Tatsuya, Kou Yamada, and Yuko Tatsumi. “The parameterization of all two-degree-of-freedom strongly stabilizing controllers”. ECTI Transactions on Computer and Information Technology (ECTI-CIT) 7, no. 1 (April 6, 2016): 88–96. accessed April 22, 2026. https://ph01.tci-thaijo.org/index.php/ecticit/article/view/54357.