 Richard identified Leontius of Jerusalem as the author of "Contra Monophysitas" and "Contra Nestorianos", while assigning to Leontius of Byzantium the three books "Contra Nestorianos et Eutychianos", the treatise against Severus of Antioch known as "Epilysis", and the "Triginta capita contra Severum".Leontius of Byzantium is also considered the author of the "Dialogue against the Aphthartodocetists", and possibly other works as well.Current scholarship identifies Leontius of Byzantium as the Leontius mentioned in documents from the reign of Justinian (527–565) and in the biographies of the sixth-century ascetics written by Cyril of Scythopolis, though the latter identification has been challenged.