1. Basmann, R.L. (1988). Causality Tests and Observationally Equivalent Representations of Econometric Models. Journal of Econometrics, 39, 69–104.
2. Brown, L.D. (1990). An Ancillarity Paradox Which Appears in Multiple Linear Regression (with discussion). The Annals of Statistics, 18, 471–538.
3. Cavanagh, C.L. and Rothenberg, T.J. (1995). Generalized Least Squares with Nonnormal Errors. Advances in Econometrics and Quantitative Economics, G.S. Maddala, P.C.B. Phillips and T.N. Srinivasan (eds). Oxford, UK: Blackwell.
4. Cochran, W.G. (1977). Sampling Techniques. 3rd edition. New York: John Wiley & Sons.
5. Crainiceanu, C.M., Ruppert, D. and Wand, M.P. (2004). Bayesian Analysis for Penalized Spline Regression Using WinBUGS. Posted in the Internet.