Ülle Kotta
- Input-Output Decoupling of Nonlinear Recursive Systems. KYBERNETIKA 36 (2000) n.1, 43-51.
- Systems with Associative Dynamics. KYBERNETIKA 38 (2002) n.5, 585-600.
- A Geometric Solution to the Dynamic Disturbance Decoupling for Discrete-time Nonlinear Systems. KYBERNETIKA 40 (2004) n.2, 197-206.
- Simplification of the Generalized State Equations. KYBERNETIKA 42 (2006) n.5, 617-628.