Thesis (Ph.D.) _ University of London, 1991.
Ukrainian linguistic elements in the Russian language, 1680-1760 : (with special reference to the writings of Dimitri Rostovsky, Theofan Prokopovich, Stefan Yavorsky, Aleksandr Sumarokov and Mikhail L by Petro Cymbalistyj. ISBN 0903425254. Published by School of Slavonic and East European Studies, University of London in 1991. Publication and catalogue information, links to buy online and reader comments.