Karl-Heinz Tritschler
He is known for having officiated at the 1988 Summer Olympics , and the 1989 European Cup Final between AC Milan and Steaua Bucureşti . 
<triplet> 1988 Summer Olympics <subj> 1988 <obj> point in time <triplet> 1989 European Cup Final <subj> 1989 <obj> point in time <subj> AC Milan <obj> participating team