I have added the following article by Ann Taylor to the bibliography at Greek-Language.com:
“The change from SOV to SVO in Ancient Greek.” Language Variation and Change. 6.1 (1994) 1-37.
While the order of major sentence constituents is quite free at every stage in the development of Ancient Greek, the distribution of those constituents is not random at any stage, and one particular constituent order can be shown to be dominant at each stage. Taylor argues that the dominant constituent order was verb-final (SOV) in Homer, but changed to verb-medial (SVO) by the Hellenistic period.
Using the paradigm of Kroch (1989), Taylor constructs two models—one for the verb-final grammar of the Homeric period (before 800 B.C.) and one for the verb-medial grammar of the Hellenistic Koiné (c. 100 A.D.). She describes the intervening period (Herodotus, c. 450 B.C.) as in part like Homer and in part like the Koiné. She shows further that the ratio of these two constituent orders in Herodotus is also supported by an independent measure of the distribution of weak pronouns and clitics.