| 421 | x-nov1.1 | Novak, Michael | Toward Understanding Aristotle's Categories | da |
| 422 | X-ome1.1 | O'Meara, Dominic J. | The hierarchical ordering of the reality in Plotinus | da |
| 423 | x-ock1.1 | Ockham William | De scientia in generali et de scientia naturali in speciali | da |
| 424 | X-ock1.2 | Ockham, William ; Davies, Julian (trad) | Ockham on Aristotle's Physics: a translation of Ockham's Brevis summa libri physicorum | da |
| 425 | x-opp1.1 | Oppenheimer Paul E. & Zalta, Edward N. | On the Logic of the Ontological Argument | da |
| 426 | x-osb1.1 | Osborne, Thomas Jr. | "Unibilitas": The Key to Bonaventure's Understanding of Human Nature | da |
| 427 | x-owe1.1 | Owens, J. | Aquinas on Infinite Regress | da |
| 428 | X-pap1.1 | Papahagi, A. | The Transmition of Boethius' "de Consolatione Philosophiae" in the Carolingian Age | da |
| 429 | X-pap1.2 | Papahagi, Adrian | Priorităţile cercetării manuscriselor medievale occidentale din România | da |
| 430 | X-pas1.3 | Pasqua, Herve | L'unite de l'Etre parmenidien | da |
