Benko managed the non-profit institution for two decades, attracting Spanish virtuosa Alicia de Larrocha to act as the actual President of the corporation, and building an enormous collection of recordings, scores, memorabilia and associated matter concerning concert pianists.
Alicia Keys | Alicia de Larrocha | Alicia Alonso | Alicia Silverstone | Alicia Villarreal | Alicia Ostriker | Alicia Molik | Alicia Witt | Alicia Fox | Alicia Banit | Alicia Alonzo | New Day (Alicia Keys song) | Ana Alicia | Alicia Svigals | Alicia Masters | Alicia Gallagher | Alicia | The Diary of Alicia Keys | Alicia Suazo | Alicia Ross | Alicia Ramsey | Alicia Penalba's ''The Great Double | Alicia Machado | Alicia Leigh Willis | Alicia Giménez Bartlett | Alicia Coutts | Alicia Coppola | Alicia Bárcena Ibarra | Alicia Austin | Alicia Alonso |
She has participated in the master classes of distinguished artists such as Alicia de Larrocha, Claude Franck, Jon O'Connor, and Jerome Rose.
The PRSO has hosted various internationally renowned artists, including Plácido Domingo, Luciano Pavarotti, Justino Díaz, Kiri Te Kanawa, and Alicia de Larrocha, among others, and has performed in various Central and South American countries as well as in the United States.
The orchestra has collaborated with soloists such as Alicia de Larrocha, Pepe Romero, Montserrat Caballé, Philippe Entremont, Nicanor Zabaleta, Joaquín Achúcarro, Henryk Szeryng, Yehudi Menuhin and Neville Marriner.
A specialist in the music of Granados, Riva is the Assistant Director of the 18 volume critical edition of the Complete Works for Piano of Enrique Granados, directed by Alicia de Larrocha and published by Editorial Boileau, Barcelona, 2001, which is the first complete catalog of the composer's works for piano.