As a mathematical statistics student Rangcher book named Linear Models In Statistics was very helpful for me. specially in working with mean and variance of quadratic forms. It is available in this link. I hope it be useful for other student and researchers too.

As a mathematical statistics student Rencher's book named Linear Models In Statistics was very helpful for me, especially in working with mean and variance of quadratic forms. It is available in this link. I hope it could be useful for other students and researchers too.