Horrocks 1981: G. C. Horrocks, Space and time in Homer. Prepositional and adverbial particles in the Greek epic, Monogr. in Class. Stud. New York Arno Pr. 1981 xix & 314 p.
Horrocks 1987: G. C. Horrocks, The Ionian epic tradition. Was there an Aeolic phase in its development ?, Minos 20-22 1987 269-294.