"Hard, pp. 68–69; Gantz, pp. 2, 45; West C.E.1983, p. 123; Apollodorus, 1.1.1–1.2.1. As for Apollodorus' sources, Hard, p. 68, says that Apollodorus' version "perhaps derived from the lost Titanomachia or from the Orphic literature"; see also Gantz, p. 2; for a detailed discussion of Apollodorus' sources for his account of the early history of the gods, see West C.E.1983, pp. 121–126."