Lipitakis, Elias A. (ed.), HERCMA ’98. Proceedings of the 4th Hellenic-European conference on Computer mathematics and its applications. Athens, Greece, September 24-26, 1998. In 2 vols. Athens: LEA, Athens University of Economics and Business, Department of Informatics. 798-810 (1998).
Brebbia, C. A. (ed.), Boundary element research in Europe. EUROBEM 98. Proceedings of the 2nd European boundary element symposium held in Southampton, GB, May 19-21, 1998. Southampton: C M Publications. 67-80 (1998).
Mandel, Jan (ed.) et al., Domain decomposition methods 10. The 10th international conference, Boulder, CO, USA, August 10–14, 1997. Providence, RI: AMS, American Mathematical Society. Contemp. Math. 218, 341-348 (1998).