Վահան Սարաֆյան

1986 -Visiting Prof. at the Iena University, Germany 
1988- Visiting Prof. at the Iena University, Germany 
1995- Visiting Prof. at the Dresden University, Germany 
1996- Visiting Prof. at the University of Maryland, USA 
1996- Visiting Prof. of the Fachhochschul Schmalkalden, Germany