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