Cook, Arthur B.: Zeus: a study in ancient religion (Band 2,1): Zeus god of the dark sky (thunder and lightning): Text and notes (Cambridge, 1925)

Plate XIX

Stele obtained by W. H. Buckler in Constantinople : Zeus Sabdzios on
horseback, with altar, krater, and leafless tree, in which are eagle and snake,

surmounted by votive inscription.

See page 282 n. 2.