Mikhail Gorbachev, final leader of Soviet Union, dies at 91 - ABC News
Former Soviet President Mikhail Gorbachev has died, Russian news reports
Gorbachev calls for nuclear weapons treaty, Feb. 28, 1987 - POLITICO
Russia: Mikhail Gorbachev changed history, but was wrong about ties to West - BBC News
Mikhail Gorbachev: World leaders react to death of last Soviet leader - National
Mikhail Gorbachev's was a truly great revolution
The meaning of Mikhail Gorbachev
Mikhail Gorbachev says 'it looks like the world is preparing for war', The Independent
Mikhail Gorbachev, the Russian Who Sank the Soviet Empire With His Own Glasnost, Dead at 91
Mikhail Gorbachev Fast Facts
Who is Mikhail Gorbachev? Former leader of the Soviet Union who helped end the Cold War and Nobel Prize winner
Putin Reacts to Mikhail Gorbachev's Death as World Pays Tribute - The New York Times
Mikhail Gorbachev, who steered Soviet breakup, dies at 91