[[1] Sharpe, William F, The Arithmetic of Active Management, The Financial Analysts' Journal Vol. 47, No. 1, January/February 1991. pp. 7-9 Copyright, 1991, Association for Investment Management and Research Charlottesville, VA, http://www.stanford.edu/~wfsharpe/art/active/active.htm10.2469/faj.v47.n1.7]Search in Google Scholar
[[2] Nichev, N., The demand for income and investment strategy of the funds, Research Papers 64, VVOVU “Vassil Levski”, Veliko Tarnovo, 1998.]Search in Google Scholar
[[3] Graham, B., Dodd, David L., Security Analysis, New York: McGraw Hill Book Co., 1934.]Search in Google Scholar
[[4] Graham, B., The Intelligent Investor, New York: Collins, Ch.20, 1949.]Search in Google Scholar
[[5] Graham, B., The Intelligent Investor, New York: Collins, Ch.20, 1949]Search in Google Scholar
