Khatri, C. G. - In: Journal of Multivariate Analysis 9 (1979) 4, pp. 589-598
It is established that a vector (X'1, X'2, ..., X'k) has a multivariate normal distribution if (i) for each Xi the regression on the rest is linear, (ii) the conditional distribution of X1 about the regression does not depend on the rest of the variables, and (iii) the conditional distribution...