| Author | Titles | | 1.
| Oliver, Steve | 4 | | 2.
| Oliveras, Elena | 1 | | 3.
| Oliveras, Jordi | 2 | | 4.
| Oliveras Segui, Arnau | 1 | | 5.
| Oliveria, Alves de | 1 | | 6.
| Olivès, Claire, 1958- | 0 | | 7.
| Related author: Totem (Grupo de artistas) | 1 | | 8.
| Olivetti, Adriano | 2 | | 9.
| Olivetti, Alberto | 1 | | 10.
| Olivetti, Armando | 8 | | 11.
| Olivié, Jean-Luc | 4 |
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