Vaclav Havel, John Keane (2016). “The Power of the Powerless: Citizens Against the State in Central Eastern Europe: Citizens Against the State in Central Eastern Europe”, p.105, Routledge
Daniel Bell (1962). “The End of Ideology: On the Exhaustion of Political Ideas in the Fifties : with "The Resumption of History in the New Century"”, p.309, Harvard University Press