6FRECKA T J, HOPWOOD W S. The effects of outliers on the cross-sectional distributional properties of financial ratios[J]. The Accounting Review, 1983,58(1) : 115-128.
7GRAY S J, MAUNDERS K T. Value added reporting: uses and measurement[R]. London Association of Certified Accountants, 1980.
8RIAHI-BELKAOUI A. Value Added Reporting and Research: State of the Art[M]. London: Quorum Books, 1999.
