Billingsley, John. <br/><br/>
Controlling with computers:  control theory and practical digital digital systems/ 
John Billingsley 
 - Berkshire, England:  McGraw Hill publishing,  1989. 
 - 296p. 
<br/><br/><label>ISBN: </label>9 780070 841932 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Automatic theory.<br/>Control theory.<br/>Digital control