Harri, J, ??? . 2011. St. Petersburg Court Chant and the Tradition of Eastern Slavic Church Singing. Turun yliopiston julkaisuja. Ser. B. ??? 340. Humaniora. (Turun Yliopiston Julkaisuja. Ser. B). Turku: University of Turku. http://ecmr.fi/Scanned_Books_etc/AnnalesB340Harri.pdf.