Piret, Ph. <br/><br/>
Convolutional codes  an algebraic approach. 
by Ph. Piret 
 - Cambridge  MIT press  1988 
 - xiv, 339p. 
<br/><br/><label>ISBN: </label>0262161109 
<br/><br/><label>Dewey Class. No.: </label>519.4  / N885