DFFITS
↑ Belsley, David A.; Edwin Kuh, Roy E. Welsch (1980). Regression diagnostics : identifying influential data and sources of collinearity. Wiley series in probability and mathematical statistics. New York: John Wiley & Sons. ISBN 0471058564
↑ Montogomery, Douglas C.; Elizabeth A. Peck (1992). “Appendix C.4” (English). Introduction to Linear Regression Analysis (2nd ed. ed.). New York: John Wiley & Sons. pp. 504-505. ISBN 0-471-53387-4
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