1. O. Neugebauer, “The Transmission of planetary theories in ancient and medieval astronomy”, Scripta mathematica, 22 (1956), 165–192; D. Pingree, “The Recovery of Early Greek astronomy from India”, Journal for the history of astronomy, vii (1976), 109–123; D. Pingree, “History of Mathematical astronomy in India”, Dictionary of Scientific Biography, 15 (1978), 533–633.
2. G. de Callataÿ, Annus Platonicus: A Study of World Cycles in Greek, Latin and Arabic Sources. Publications de l’Institut orientaliste de Louvain 47. Louvain-la-Neuve, 1996, reviews all the relevant source material. A. Jones, “The Keskintos Astronomical Inscription: Text and Interpretations”, SCIAMVS, 7 (2006), 3–42, is the definitive analysis of the Keskintos inscription, the clearest use of a great year in a Greco-Roman source; B. L. van der Waerden, “The Great Year in Greek, Persian and Hindu Astronomy”, Archive for history of exact sciences, 18 (1978), 359–383 is a good presentation of the evidence, but his conclusions are not solidly proven.
3. G. J. Toomer, Ptolemy’s Almagest (1984), 423–426.
4. O. Neugebauer, A history of ancient mathematical astronomy, (1975), 380–468.
5. Toomer, ibid. (ref. 3), Books IV–V for the Moon and Books IX–XI for the planets.