1. H. Daalder, ‘Cabinet and Party Systems in Ten Smaller European Democracies’, Acta Politica, vol. 6, 1971, pp. 282–303.
2. L.C. Dodd, Coalitions in Parliamentary Government, Princeton, 1976.
3. A. Downs, An Economic Theory of Democracy,New York, 1957, chapter 9 (Problems of Rationality under Coalition Governments).
4. K.R. Gladdish, ‘Two-Party vs. Multi-Party, the Netherlands and Britain’, Acta Politica, vol. 7, 1972, pp. 342–361.
5. S. Groennings et. al., The Study of Coalition Behavior; theoretical perspectives and cases from four continents, New York, 1970.