Statistical methods in finance. - Maddala, G. S.; Rao, Calyampudi Radhakrishna; Rao, C. Radhakrishna 1920-; Rao, Calyampudi Radhakrishna, 1920-; Maddala, G. S; Rao, C. Radhakrishna (Handbook of statistics ;, 1996)