Prestel, Alexander and Delzell, Charles N. <br/><br/>
Positive polynomials; from Hilbert's 17th problem to real algebra   

 - Berlin  Springer-Verlag  2001 
 - viii, 267p. Bibl. Index. 
 - Springer monographs in Mathematics .
<br/><br/>  
<br/><br/><label>ISBN: </label>3540412158 
<br/><br/><label>Dewey Class. No.: </label>512  / P936.PP