"Evolution of the Musical Notation in Medieval Russia"

Does any member of the forum has any information on the abovementioned?
(I believe) It is an article by Miloš Velimirović.
Any relevant comment is welcome, as I currently do relevant research.

Thank you all.


Νεοκλής Λευκόπουλος, Γενικός Συντονιστής
It's an article in the following volume:
Cyrillomethodianum, VIII-IX; Thessaloniki 1984-1985 (p. 165-173)
sold by the "Society for Macedonian Studiies" (Εταιρεία Μακεδονικών Σπουδών). You may ask there for a copy or reprint.