Walters, A.A.. <br/><br/>
Introduction to Econometrics /  

 - Second Ed. /  
 - London :   Macmillan Press Ltd. ,   1991 
 - p377 :  
<br/><br/><label>ISBN: </label>0-333-02567-9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics
<br/><br/><label>Dewey Class. No.: </label>X0bB28  / K8W,L0;1