// <I>Recent<D> researches in engineering and automatic control : Proc. of the 2nd European conference of "Control''(ECC '11), Puerto De La Cruz, Tenerife, Spaine, 2011. - WSEAS, 2011, p. 13-18.
V. Pencheva; A. Asenov; D. Grozev;
E. Savev;
P. Gagova и др.