| 1551 | Carte | ~C.23 | Lancranjan, Ioan | Incercari de reabilitare a gandirii crestine medievale. Studiu de sinteza | da |
| 1552 | Articol | X-aba1.1 | Abaelard, Peter; ed. Geyer, Bernhard | Incipiunt Glossae secundum magistrum Petrum Abaelardum super Porphyrium | da |
| 1553 | Articol | X-wer1.1 | Werner, Hans-Joachim | Incommunicabilitas et Libertas | da |
| 1554 | Carte | ARI1.53.1 | Hermann Bonitz | Index Aristotelicus, vol I | da |
| 1555 | Carte | ARI1.53.2 | Hermann Bonitz | Index Aristotelicus, vol II | da |
| 1556 | Carte | GIL1.1 | Gilson, Etienne | Index scolastico-cartesien | da |
| 1557 | Carte | THO1.4 | | Indices auctoritatum omnique rerum notabilium occurrentium in S.T et in S.C.G | da |
| 1558 | Articol | X-tat1.2 | Tătaru-Cazaban, Bogdan | Individualitate și infinit la Nicolaus Cusanus | da |
| 1559 | Carte | BAR7.1 | Barber, Kenneth F.; Garcia, Jorge J. E. (eds.) | Individuation and Identity in Early Modern Philosophy, | da |
| 1560 | Carte | GRA2.3 | Gracia, Jorge J. E. (ed.) | Individuation in Later Scholasticism and Counter-Reformation. 1150-1650 | da |
