Darmstädter Ferienkurse
Shortly after graduating she began to attend the courses music writing and harmony given by Profressor Andre Souris at the Royal Conservatory of Brussels, and as a result was invited to attend the Summer School for New Music in Darmstadt (Darmstädter Ferienkurse), where she met the Belgian musicologist Celestin Deliege, whom she married in 1954.