Wallace's Weak Mean Square Error Criterion for Testing Linear Restrictions in Regression: A Tighter Bound
T. A. Yancey, G. G. Judge, M. E. Bock, Wallace's Weak Mean Square Error Criterion for Testing Linear Restrictions in Regression: A Tighter Bound, Econometrica, Vol. 41, No. 6 (Nov., 1973), pp. 1203-1206