Communication to : 11th annual review of progress in applied computational electromagnetics, Naval postgraduate school, Monterey, CA (USA), March 20-25, 1995SIGLEAvailable at INIST (FR), Document Supply Service, under shelf-number : 22419, issue : a.1995 n.113 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc