In 1986 he was an invited speaker at the International Congress of Mathematicians in Berkeley, California, and his talk was entitled "Milnor K-theory and Galois cohomology".
1986年他被邀请在加利福尼亚州伯克利举行的全球数学家大会上发言，演讲标题为"Milnor K-theory and Galois cohomology"。