EM algorithm and extensions 
McLachlan, Geoffrey J., 
 - New York :  Wiley,  1997 
 - xvii, 274 p. :  ill. ;  24 cm. 
 - Wiley series in probability and statistics. .
<br/><br/> A Wiley-Interscience publication." 
<br/><br/><label>ISBN: </label>0471123587 (acid-free paper)