@ARTICLE{Gaber_Bahaa_Optimal_2011, author={Gaber Bahaa and Mohamed Tharwat}, number={No 4}, journal={Archives of Control Sciences}, howpublished={online}, year={2011}, publisher={Committee of Automatic Control and Robotics PAS}, title={Optimal control problem for infinite variables hyperbolic systems with time lags}, URL={http://so.czasopisma.pan.pl/Content/84207/PDF/3.pdf}, doi={10.2478/v10170-011-0003-5}, }