Bibl. J.-B.-J. Delambre, Histoire de l’astronomie ancienne, Paris, 1817, II, 458-503; J. L. Heiberg, ‘Ptolemäus de Analemmate’, Abhandlungen zur Geschichte der Mathematik 7 (1895), 1-30; J. L. Heiberg, Claudii Ptolemaei opera quae exstant omnia, II: Opera astronomica minora, Leipzig, 1907, xi-xii and clxxix; P. Luckey, ‘Das Analemma von Ptolemäus’, Astronomische Nachrichten 230 (1927), no. 5498, 17-46; A. G. Drachmann, ‘Heron and Ptolemaeios’, Centaurus 1 (1951), 117-131; O. Neugebauer, A History of Ancient Mathematical Astronomy, Berlin-New York, 1975, II, 839-856; D. R. Edwards, Ptolemy’s “Peri Analemmatos” – an Annotated Transcription of Moerbeke’s Latin Translation and of the Surviving Greek Fragments, with an English Version and Commentary, PhD dissertation, Brown University, 1984; R. Sinisgalli, S. Vastola, L’Analemma di Tolomeo, Firenze, 1992; N. Sidoli, Ptolemy’s Mathematical Approach: Applied Mathematics in the Second Century, PhD dissertation, University of Toronto, 2004, 182-211; O. Pedersen, A Survey of the Almagest. With Annotation and New Commentary by Alexander Jones, New York-Dordrecht, 2011 (first edition 1974), 403-404; C. Tolsa, Claudius Ptolemy and Self-Promotion. A Study on Ptolemy’s Intellectual Milieu in Roman Alexandria, PhD dissertation, Universitat de Barcelona, 2013, 243-245; J. Guerola Olivares, El Collegio Romano I els orígens de la trigonometria: De l’Analemma de Ptolemeu a la gnomonica de Clavius, PhD dissertation, Universitat Autònoma de Barcelona, 2018, 50-145; N. Sidoli, ‘Mathematical Methods in Ptolemy’s Analemma’, in Ptolemy’s Science of the Stars in the Middle Ages, eds D. Juste, B. van Dalen, D. N. Hasse, C. Burnett, Turnhout, 2020, 35-77.