1. Zimmermann, R. (1996) The Law of Obligations: Roman Foundations of the Civilian Tradition. Oxford
2. Wingo, E. O. (1972) Latin Punctuation in the Classical Age (Janua Linguarum, Series Practica 133). The Hague
3. The Fetiales: a Reconsideration
4. Welles, C. B., R. O. Fink, and J. F. Gilliam (1959) The Excavations at Dura-Europus 5.1: The Parchments and Papyri. New Haven
5. Walbank, F. W. (1979) A Historical Commentary on Polybius Ⅲ. Oxford