T. Leslie Shear, Jr., Kallias of Sphettos and the Revolt of Athens in 286 B. C., Hesperia Supplements, Vol. 17, Kallias of Sphettos and the Revolt of Athens in 286 B. C. (1978), pp. i-iii+v-x+1-117+119-122
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T. Leslie Shear (1978) studied this question.