Belsley, David A. Regression diagnostics : identifying influential data and sources of collinearity / David A. Belsley, Edwin Kuh, Roy E. Welsch - New York : Wiley, 1980 - 292 p. ; 24 cm. - Wiley series in probability and mathematical statistics . Includes index Bibliography: p. 277-284 ISBN: 0471058564 Subjects--Topical Terms: Regression analysis