ダルムシュタット夏季現代音楽講習会
He pursued postgraduate work at Princeton University (1956 master of fine arts) with Milton Babbitt, Roger Sessions, Earl Kim, Edward T. Cone, Arthur Mendel, Oliver Strunk, and Nino Pirrotta. A Fulbright Fellowship (1956 – 58) enabled him to study at the Accademia di Santa Cecilia in Rome with Goffredo Petrassi and at the Darmstädter Ferienkurse in Darmstadt with Karlheinz Stockhausen, Bruno Maderna, and Luigi Nono.