Svetozar Margenov Lubin G. Vulkov Jerzy Wasniewski Numerical Analysis and Its Applications, 4th International Conference, NAA 2008, Lozenetz, Bulgaria, June 16-20, 2008. Revised Selected Papers 5434 2009 http://dx.doi.org/10.1007/978-3-642-00464-3 978-3-642-00463-6 NAA Lecture Notes in Computer Science Springer db/conf/naa/naa2008.html