1. Glarean, Heinrich. ca. 1513. De gaeometriae principiis ad sphaerae astronomicae noticiam necessariis. Brown University, John Carter Brown Library, MS Cod.Lat.1.
2. Lefèvre d’Étaples, Jacques. ca. 1495. De magia naturali. Olomouc, University Library, MS M.I.119.
3. Sacrobosco, Joannes. 1493. Tractatus de Sphera. Paris: Georg Mittelhus. Munich, Universitätsbibliothek der Ludwig-Maximilians-Universität, 4 Inc.lat.310 no. 6. A copy heavily annotated by Heinrich Glarean.
4. Apian, Peter. 1529. In Cosmographia…Additis de eadem re ipsius Gemmae Phyr. libellis, ed. Gemma Frisius. Antwerp: Arnold Berckmann.
5. Ciruelo, Pedro. 1498. Uberrimum sphere mundi commentum intersertis etiam questionibus domini Petri de Aliaco. Paris: Jehan Petit. http://hdl.handle.net/21.11103/sphaera.100038 .