United States. President (1837-1841 : Van Buren), Martin Van Buren (1838). “Message from the President of the United States to the Two Houses of Congress: At the Commencement of the Third Session of the Twenty-fifth Congress”, p.14
"[Flashback interview] Retired Senator Malcolm Wallop: 'Frontier Freedom'". Interview With Rick Henderson, William “Chip” Mellor, www.ff.org. December 21, 2012.
Wojciech Chmurzyński, Bruno Schulz, Muzeum Literatury im. Adama Mickiewicza w Warszawie (1995). “Bruno Schulz 1892-1942: katalog-pamiętnik wystawy "Bruno Schulz. Ad memoriam" w Muzeum Literatury im. Adama Mickiewicza w Warszawie”
Appeal to the military to not participate in the coup attempt, while standing on a tank during troop movements against the Russian White House, August 19, 1991.