Communication to : RTO AVT Symposium on vortex flow and high angle of attack, Loen (Norvege), May 07-11, 2001SIGLEAvailable from INIST (FR), Document Supply Service, under shelf-number : 22419, issue : a.2002 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc