bibliografia

dinamica del proceso
http://web.ebscohost.com/ehost/detail?sid=f18a03/08/12

http://web.ebscohost.com/ehost/detail?/03/08/12

http://web.ebscohost.com//03/08/12

http://web.ebscohost.com/ehost/detail?sid=f18a4c 03/08/12

http://web.ebscohost.com/ehost/detail?sid=03/08/12

http://web.ebscohost.com/ehost/detail?sid=f18a4c72-2307-4937-abbc-30032265f013%40sessionmgr11&vid=10&hid=21&bdata=Jmxhbmc9ZXMmc/03/08/12

 http://www.youtube.com/watch?v=YoM9PrObni8/03/08/12