Darmstädter Ferienkurse
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.