J. Orava

Polynomial operators in non-linear systems theory

A. Halme, J. Orava, H. Blomberg, 1971 .

Generalized polynomial operators for nonlinear systems analysis

A. Halme, J. Orava, 1972 .

Inversion of generalized power series representation

A. Halme, J. Orava, 1974 .

Fixed point of polynomial type nonlinear operators

A. Halme, J. Orava, 1974 .

Time-Varying Transformations on Linear System Representations

J. Orava, K. Zenger, 1996 .