Leser, C.E.V..
Econometric Techniques and Problems / - Second Ed. / - London WC2B 5RX : Charles Griffin & Company Ltd. , 1987 - p.144 :
0-85264-218-0
X)bB28 / L4L
Econometric Techniques and Problems / - Second Ed. / - London WC2B 5RX : Charles Griffin & Company Ltd. , 1987 - p.144 :
0-85264-218-0
X)bB28 / L4L