Shavokhina, E. E.
Znamennoe mnogogolosie v ego sviaziakh s obshchimi zakonomernostiami razvitiia polifonii
Znamenny polyphony in its relation to the general development of polyphony
Ph. D. Thesis
Russian
1987
181+286 pp.
Leningrad: 1987
Early Russian Polyphony
2578