sentences:  Though the name of the book "Oktoich" derived from the Greek name Octoechos (Old Slavonic "Osmoglasnik," because "glas"" "is the Slavonic term for echos), the Slavic book did rather correspond to the unnotated Tropologion, and often it included the hymns of the Irmolog as well.The Slavic reception, although it can be regarded as faithful translation of the Byzantine books, is mainly based on early Theta notation, which was used by Slavic reformers in order to develop own forms of notation in Moscow and Novgorod (znamenny chant).The translation activities between 1062 and 1074 at the Kievan Pechersk Lavra had been realised without the help of South Slavic translators.