Presented at LMS
Durham Symposium on Computational Methods for wave propagation in direct
scattering, Durham, July 2002
Presented at the NSF-CBMS
conference on `Numerical Methods in Forward and Inverse Electromagnetic
Scattering' , Golden, Colorado, June 2002
Seminaire de l'Ecole Centrale de Paris, Janvier 2002
Presented in the International Seminar "DAY
on DIFFRACTION - 2001", St Petersbourg, May 2001