Lénart J. de Regt, "Canon and Biblical Text in the Slavonic Tradition in Russia," The Bible Translator 67.2 (2016): 223–39.
I do not know much about the Slavonic Bible, so this article was helpful to me.
In the Russian Orthodox Church, the Bible includes non-canonical as well as canonical books.This article focuses especially on the Old Testament, so the issue has to do with the role of the LXX in the Orthodox churches.
De Regt says that there are eleven "non-canonical" books in the Bible of the Russian Orthodox Church, not collected together but scattered throughout the OT. These books are:
- 1 Esdras
- Wisdom of Solomon
- Epistle of Jeremiah
- 1 Maccabees
- 2 Maccabees
- 3 Maccabees
- 4 Ezra
Also, some non-canonical sections of canonical books: additions to Daniel, Esther, Psalms (Psalm 151), and Chronicles (Prayer of Manasseh)--indicated with square brackets (p. 235).
"In, for example, the Russian Synodal Translation [...] they are marked as non-canonical by an asterisk and a note" (224).
De Regt briefly reviews canon history, then asserts that the canon was never fixed in the East (224–27).
Then he turns to the text of the books, and shows that traditionally the LXX has been highly regarded in Russia, though the LXX was not canonized. The Slavonic Bible is a hybrid, based largely on the LXX, but not completely. The earliest full Slavonic Bible contains several books translated from the Vulgate (de Regt, pp. 229–30).
For more, see this book, often cited by de Regt.