Jan Ježek
- Rings of Skew Polynomials in Algebraical Approach to Control Theory. KYBERNETIKA 32 (1996) n.1, 63-80.
- Non-Commutative Rings of Fractions in Algebraical Approach to Control Theory. KYBERNETIKA 32 (1996) n.1, 81-94.
- Discrete-Time Symmetric Polynomial Equations with Complex Coefficients. KYBERNETIKA 38 (2002) n.2, 113-139.