"What happened when Ryanair boss Michael O’Leary went on Twitter for live Q&A? He crash-landed spectacularly" by Simon Calder, www.independent.co.uk. October 22, 2013.
Mikhail Sergeevich Gorbachev, Ernest W. Lefever (1989). “Perestroika: how new is Gorbachev's new thinking? : Mikhail Gorbachev's views and responses from Zbigniew Brezinski ... [and others]”, Ethics & Public Policy Center