Key points are not available for this paper at this time.
Eugene Vanderpool, James R. McCredie, Arthur Steinberg, Koroni: A Ptolemaic Camp on the East Coast of Attica, Hesperia: The Journal of the American School of Classical Studies at Athens, Vol. 31, No. 1 (Jan. - Mar., 1962), pp. 26-61
Vanderpool et al. (Mon,) studied this question.