Dzindzibadze Z., Parakliton, Tbilisi 1998. Erkvanidze M. (ed.), Georgian Church Chant (Gelati School). The hymns of the Twelve Feasts of Our Lord and Immovable Feasts, Tbilisi 2006. Gunia B., Gunia I., Liturgical collection #1, Tbilisi 1996. Gunia B., Gunia I., Liturgical collection #2, Tbilisi 1996 Gvakharia V., Shugliashvili D., Razmadze N., Description of the Manuscripts and Alphabet Catalogue of Georgian Sacred Hymns – According to the Handwritten Scores of St. Pilimon the Chanter (Koridze) and St. Ekvtime the Confessor (Kereselidze), Tbilisi 2013. Khachidze L., Metreveli E., Poetry of Iovane Minchkhi – Monuments of Old Georgian Poetry, “Metsniereba”, Tbilisi 1987. Naneishvili N., The serve of Christ Easter in Georgian tradition, Master's thesis, V. Sarajishvili Tbilisi State Conservatoire, Tbilisi 2009. Skaballanovich M., The Typikon Interpreted in Russian, Kiev 1910. Soloviov H.A., A Historical Discourse on the Fasts of the Orthodox Church, in Russian, Moscow 1837. Tatishvili K., Dugashvili E. (2006); Archimandrit Kipriane (Kerni) – History of Church Poetry, [online] www.library.church.ge [accessed: 18.03.2016] Triodioni (Markhvani), Press of Eqvtime Kheladze, Tbilisi 1901. [online] http://www.orthodoxtheology.ge [accessed: 18.03.2016]; St. Paul’s Orthodox Christian Theology Centre, Lent – the historical development, 2012. H-154 – “Notebooks #1,2,3,4,5 written in Guria, Theme-songs”. Written by P. Koridze, E. Kereselidze. Q-666 – “First Score” [festal hymns]. Recorder – P. Koridze, Kutaisi 1885. Q-668 – “Score III, Notebook #7”. Lents hymns score. Written by P. Koridze, Kutaisi 1886. Q-680 – “Book V, Notebook #5 written in Kutaisi”. (1886); Written by P. Koridze. Q-681 – “VI book – the notebook #7”. Written by P. Koridze, Kutaisi 1886. Q-687 – “Book XII”. The manuscript is a composition with Theme-songs. Q-689 – “Book #14 – Theme songs”. Written by E. Kereselidze. Q-690 – “Book #15 – Great Feasts hymns”. (1904-1905). Written by E. Kereselidze, P. Koridze, R. Khundadze. Q-694 – “Book #27, Notebook #19 – Great Feasts Hymns”. Written by P. Koridze, E. Kereselidze.