//-->
Small Sample Properties of Tests of Equality between Sets of Coefficients in Two Linear Regressions under Heteroscedasticity.
Ohtani, Kazuhiro, (1985)
Testing equality between sets of coefficients after a preliminary test for equality of disturbance variances in two linear regressions
Toyoda, Toshihisa, (1986)
Estimation of regression coefficients after a preliminary test for homoscedasticity
Ohtani, Kazuhiro, (1980)