A manuscript in Athens National library, under the number 928, in which beside Kir Stefan, the names of authors Hieromonk Nikola Srbin and Isaija Srbin from the XVI century are found (although a mention of Isaija appears even in the XV century). Isaija wrote "Polyeleos Servikos" based on the psalm verses 134 and 135, in both church Slavic and Greek languages, while Nikola is the author of the Cherubic hymn with Greek text.