Todor Boyanov Stefka Dimova Krassimir Georgiev Geno P. Nikolov Numerical Methods and Applications, 6th International Conference, NMA 2006, Borovets, Bulgaria, August 20-24, 2006. Revised Papers NMA Lecture Notes in Computer Science 4310 Springer 2007 978-3-540-70940-4 db/conf/nma/nma2006.html