References
- Huang , David S. 1970 . Regression and Econometric Methods , 115 New York : John Wiley & Sons, Inc. .
- Johnston , J. 1963 . Econometric Methods , New York : McGraw-Hill Book Company . Chap. 4
- Longley , James W. 1967 . “An Appraisal of Least Squares Programs for the Electronic Computer From the Point of View of the User,” . Journal of the American Statistical Association , 61 June : 819 – 41 .
- Wampler , Roy H. 1970 . “A Report on the Accuracy of Some Widely Used Least Squares Computer Programs,” . Journal of the American Statistical Association , 65 June : 549 – 65 .