- Júlia Hamari, Thomas Schippers, Robert El Hage, Fernando Iacopucci, Francesco Molinari-Pradelli, Hartje Mueller, Carlo Bergonzi, Orchestra of the Rome Opera House, John Newton, Daniel Guss, Mario Sereni, Reri Grist, Ezio Flagello, Erich Leinsdorf, Giorgio Tozzi, RCA Italiana Opera Orchestra, Shirley Verrett, Robert Merrill, Oliviero de Fabritiis, Leontyne Price, Laura Londi, Corinne Vozza, Arturo Basile