| Verfasser | Häufigkeit |
| Otero Silva, Miguel |
44 |
| Oliveira Pombeiro, Armando José Latourrette de 1949- |
8 |
| Otero Silva, Miguel 1908-1985 |
7 |
| Oliveira, Jonas da Silva |
6 |
| Silva, M. Fátima C. Guedes da 1958- |
6 |
| Andrade, André Luiz Monezi |
5 |
| Azevedo, Graça Maria do Carmo |
5 |
| De Micheli, Denise |
5 |
| García Oro, José |
5 |
| Mahmudov, Kamran T. 1980- |
5 |
| Portela Silva, María José |
5 |
| Silva, Manuel F. |
5 |
| Tokhi, Mohammad Osman |
5 |
| Verdi, Giuseppe 1813-1901 |
5 |
| Callas, Maria 1923-1977 |
4 |
| De Fabritiis, Oliviero 1902-1982 |
4 |
| Del Monaco, Mario 1915-1982 |
4 |
| Dominguez, Oralia 1927- |
4 |
| Marques, Rui Pedro Figueiredo |
4 |
| Montero, Sergio |
4 |