| Author | Titles | | 1.
| Oliva Creative Factory (S. João da Madeira, Portugal) | 11 | | 2.
| Oliva, Edgar | 1 | | 3.
| Oliva, Emilia | 1 | | 4.
| Oliva, Fernando | 5 | | 5.
| Oliva i Buxton, Victòria | 1 | | 6.
| Oliva Maria Zulmira | 1 | | 7.
| Oliva, Víctor | 2 | | 8.
| Oliva, Zulmira, 1930- | 4 | | 9.
| Olival, Fernanda | 1 | | 10.
| Olival, Luís | 1 |
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