1. Alker, H.R.Jr. (1975). ?Polimetrics: its descriptive foundations?, pp.139?210 in F.I. Greenstein and N.W. Polsby (eds.)Handbook of Political Science, Volume 7: Strategies of Enquiry. Reading, Mass: Addison-Wesley.
2. Alt, J.E., Särlvik, B. and Crewe, I. (1975). Individual differences scaling and group attitude structures. Mimeographed paper presented at the Royal Statistical Society conference on surveys in social research, Southampton.
3. Aydelotte, W.O. (1963). ?Voting patterns in the British House of Commons in the 1840s?,Comp. Stud. in Society and History, 5: 134?163.
4. Bailey, K.D. (1974). ?Interpreting smallest space analysis?,Sociological Methods and Research 3: 3?29.
5. Beck, J.V. and Arnold, K.J. (1977).Parameter Estimation in Engineering and Science. New York: Wiley.