1. Cullen, I. (1991) Risk management in investment property portfolios. A paper presented as part of the seminar series organised by the Society of Property Researchers and the RICS, entitled Property in a Portfolio Context.
2. Estates Gazette (1998) Escape from the hothouse, 14 July, 61.
3. Frodsham, M. and Key, T. (1996) Market segments & the analysis of property portfolio performance. A paper presented at the European Real Estate Society Conference, Belfast, June.
4. Investment Property Databank (2000) IPD Property Investment Digest, London, Investment Property Databank.
5. Miller, M.H. and Scholes, M. (1972) Rates of return in relation to risk: a re-examination of some recent findings, in Studies in the Theory of Capital Markets (edited by M.C. Jensen), Praeger, New York, pp. 60-62.