Křížek, Michal - Neittaanmäki, P.
Mathematical and Numerical Modelling in Electrical Engineering. Theory and Applications.
1. - Dordrecht: Kluwer Academic, 1996. 300 s. Mathematical Modelling: Theory and Applications, 1. ISBN 0-7923-4249-6
http://hdl.handle.net/11104/0071329