Molotov's report on (29 March 1940), after the Polish defeat, as quoted in the weekly Soviet newspaper "Moscow News", published by Mezhdunarodnaya Kniga, April 1, 1940.
William Blackstone, St. George Tucker (1996). “Blackstone's Commentaries: With Notes of Reference to the Constitution and Laws, of the Federal Government of the United States, and of the Commonwealth of Virginia: With an Appendix to Each Volume, Containing Short Tracts Upon Such Subjects as Appeared Necessary to Form a Connecte”, p.300, The Lawbook Exchange, Ltd.