Petrov <br/><br/>
Variational Methods in Optimum Control Theory 

 -  Academic Press  1968 
 - Mathematics in Science and Engineering .
<br/><br/><label>ISBN: </label>9780125528504 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Information Theory<br/>Calculus of variations.,Control theory.,System analysis.<br/>COMPUTERS