[2] Notable students include Doina Rotaru, Costin Miereanu, Horațiu Rădulescu, and Christian Wilhelm Berger.
[3] From 1966 to 1969, he participated in summer courses in Darmstadt, and in 1969–1970 he took part in the Study and Creation Internship at the Academy in West Berlin,[4]: 331 with support from a DAAD grant.
He also published reviews and articles in journals such as Studii de Muzicologie, Muzica, România Literară, and Melos.
After his wife died in 1998, his health deteriorated, and he moved to Târgu Mureș to stay with his sister, Edit Gogolak.
[2] Olah composed orchestral and chamber music works in which he was initially inspired by Béla Bartók, George Enescu, and Igor Stravinsky and later by the Second Viennese School, including a five-part cycle dedicated to the sculptor Constantin Brâncuși, as well as cantatas, an oratorio, choral works, and film music.