Numerical Methods and Applications 5th International Conference, NMA 2002, Borovets, Bulgaria, August 20-24, 2002, Revised Papers - Dimov, Ivan; Dimov, Ivan; Lirkov, Ivan; Lirkov, Ivan; Margenov, Svetozar D.; Margenov, Svetozar D.; Zlatev, Zahari; Zlatev, Zahari (Springer Berlin Heidelberg : Imprint: Springer, 2003)