Democratic Union (Slovakia)
The party was established on 25 March 1994 by a merger of the Democratic Union of Slovakia and the National Democratic Party, and was led by was Eduard Kukan. In 1998, it joined the Slovak Democratic Coalition, and in 2000, it merged into the Slovak Democratic and Christian Union.
- Kopecky, Petr; Učeň, Peter (2003), "Return to Europe? Patterns of Euroscepticism among the Czech and Slovak political parties", The Road to the European Union: The Czech and Slovak Republics (Manchester University Press), pp. 166–167
- Bútora, Martin; Bútorová, Zóra; Mesežnikov, Grigorij (2003), "Slovakia's democratic awakening", The Road to the European Union: The Czech and Slovak Republics (Manchester University Press), p. 52
- Hacker, Paul (2010), Slovakia on the road to independence, Penn State Press, p. 180