August 2002, visiting astronomer at "The Johns Hopkins University", Center for Astronomical Sciences

from March 1st, 2001 to September 15th, 2001: CNR post doc fellow at Catania Astrophysical Observatory

from February 1st, 2000 to January 31st, 2001 post doc fellow at "The Johns Hopkins University", Center for Astronomical Science, Baltimore, MD, USA

from January 1st, 1999 to July 31st, 1999 research contract at Catania Astrophysical Observatory

from November 1st, 1995 to October 31st, 1998 PhD student at Università degli Studi di Messina