Miglietta 2013, p. 3467. Miglietta, Massimo (2013). "Institutiones, of Gaius". In Bagnall, Roger S.; Brodersen, Kai; Champion, Craige B.; Erskine, Andrew (eds.). The Encyclopedia of Ancient History. Wiley. pp. 3467–3468. doi:10.1002/9781444338386.wbeah13119. ISBN978-1-4443-3838-6.
Schulz 1947, p. 208. Schulz, Fritz (1947). "Book review: Francis De Zulueta, The Institutes of Gaius, Part I, Text with critical notes and translation. Oxford: Clarendon Press, 1946. Pp. IV + 305. 20s. - V. Arangio-Ruiz, Antonio Guarino, Breviarium Iuris Romani. Milano: Dott. A. Giuffrè editore, 1943. Pp. IV + 641". The Journal of Roman Studies. 37 (1–2): 208–209. doi:10.2307/298477. ISSN1753-528X. JSTOR298477.
Miglietta 2013, p. 3468. Miglietta, Massimo (2013). "Institutiones, of Gaius". In Bagnall, Roger S.; Brodersen, Kai; Champion, Craige B.; Erskine, Andrew (eds.). The Encyclopedia of Ancient History. Wiley. pp. 3467–3468. doi:10.1002/9781444338386.wbeah13119. ISBN978-1-4443-3838-6.
Stagl 2014, p. 315. Stagl, Jakob Fortunat (2014). "Das didaktische System des Gaius". Zeitschrift der Savigny-Stiftung für Rechtsgeschichte: Romanistische Abteilung (in German). 131 (1): 313–348. doi:10.7767/zrgra-2014-0109. S2CID191467389.
Schulz 1947, p. 208. Schulz, Fritz (1947). "Book review: Francis De Zulueta, The Institutes of Gaius, Part I, Text with critical notes and translation. Oxford: Clarendon Press, 1946. Pp. IV + 305. 20s. - V. Arangio-Ruiz, Antonio Guarino, Breviarium Iuris Romani. Milano: Dott. A. Giuffrè editore, 1943. Pp. IV + 641". The Journal of Roman Studies. 37 (1–2): 208–209. doi:10.2307/298477. ISSN1753-528X. JSTOR298477.
Stagl 2014, p. 315. Stagl, Jakob Fortunat (2014). "Das didaktische System des Gaius". Zeitschrift der Savigny-Stiftung für Rechtsgeschichte: Romanistische Abteilung (in German). 131 (1): 313–348. doi:10.7767/zrgra-2014-0109. S2CID191467389.
Schulz 1947, p. 208. Schulz, Fritz (1947). "Book review: Francis De Zulueta, The Institutes of Gaius, Part I, Text with critical notes and translation. Oxford: Clarendon Press, 1946. Pp. IV + 305. 20s. - V. Arangio-Ruiz, Antonio Guarino, Breviarium Iuris Romani. Milano: Dott. A. Giuffrè editore, 1943. Pp. IV + 641". The Journal of Roman Studies. 37 (1–2): 208–209. doi:10.2307/298477. ISSN1753-528X. JSTOR298477.