Ackoff, Russell L. <br/><br/>
Towards a system of systems concepts 

<br/><br/> Sobretiro de : Management Science 17 (11): 83-90, 1971. 
<br/><br/><label>LCCN: </label>63652 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Análisis de sistemas.