7Markowitz H.Portfolio Selection [J].Journal of Finance, 1952,7(1):77-91.
8Sharp W F. Capita Asset Prices: A Theory of Market Equilib-rium under Conditions of Risk[J] ./oumai of Finance, 1964, 19(3):425-442.
9Lintner J.The Valuation of Risk Assets and the Selection ofRisky Investments in Stock Protfolios and Capital Budgets[J].Review of Economics and Statistics, 1965, 47(1):13-37.
10Mossin J.Equilibrium in a Capital Asset Market |J] .?cononiet-ricatl%6,13(3):768-783.