He was a member of the jury in the international violin competitions Paganini in Genoa, Montreal, Henryk Wieniawski in Polen, Citta di Brescia, David Oistrakh in Moscow and Yehudi Menuhin in England.
Er war Mitglied der Jury in den internationalen Violinwettbewerben Paganini in Genua, Montreal, Henryk Wieniawski in Polen, Citta di Brescia, David Oistrach in Moskau und Yehudi Menuhin Competition in England.