The following publications are possibly variants of this publication:
- On the invariance of the second-order modes of continuous-time systems under general frequency transformation [analog filters]Masayuki Kawamata. iscas 2003: 505-508 [doi]
- On the invariance of second-order modes under frequency transformation in 2-D separable denominator digital filtersMasayuki Kawamata, Shunsuke Koshita. iscas 2002: 777-780 [doi]
- Analysis of Second-Order Modes of Linear Continuous-Time Systems under Positive-Real TransformationsShunsuke Koshita, Yousuke Mizukami, Taketo Konno, Masahide Abe, Masayuki Kawamata. iscas 2007: 2248-2251 [doi]
- Analysis of Second-Order Modes of Linear Continuous-Time Systems under Positive-Real TransformationsShunsuke Koshita, Yousuke Mizukami, Taketo Konno, Masahide Abe, Masayuki Kawamata. ieicet, 91-A(2):575-583, 2008. [doi]
- Analysis of Second-Order Modes of Linear Discrete-Time Systems under Bounded-Real TransformationsShunsuke Koshita, Masahide Abe, Masayuki Kawamata. ieicet, 90-A(11):2510-2515, 2007. [doi]
- A novel property of the second-order modes of discrete-time systems under variable transformationShunsuke Koshita, Masahide Abe, Masayuki Kawamata. iscas 2005: 972-975 [doi]
- Invariance of Second-Order Modes under Frequency Transformation in 2-D Separable Denominator Digital FiltersShunsuke Koshita, Masayuki Kawamata. mssp, 16(3):305-333, 2005. [doi]