\ref
\item{[20]} ``MHD Modelling of Jets from AGN", 
invited review in Workshop {\it AGN in their Cosmical Environment 
at JENAM99}, Toulouse, France, September 7 - 9, 1999.
\ref
\item{[21]} ``Magnetohydrodynamic origin of AGN Jets", 
invited review in International Symposium {\it  High Energy Gamma-ray Astronomy}, 
June 26-30, 2000, Heidelberg, Germany. 
\ref
\item{[22]} ``MHD Modelling of Space Weather Drivers", 
invited review in NATO Advanced Study Institute on {\it Space Storms and Space 
Weather Hazards}, June 19-29, 2000, Hersonissos, Crete, Greece.