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