Disney copyrighting page:

* http://www.disneystudiolicensing.com/


Several websites with plot explanations and so on of phineas and ferb things:

* https://en.wikipedia.org/wiki/Phineas_and_Ferb
* http://phineasandferb.wikia.com/wiki/Phineas_and_Ferb_Wiki
* http://disney.wikia.com/wiki/Phineas_and_Ferb
* http://tvtropes.org/pmwiki/pmwiki.php/WesternAnimation/PhineasAndFerb


This page has a list of every one of Phineas and Ferb's plans:
* http://phineasandferb.wikia.com/wiki/Big_Ideas
* http://phineasandferb.wikia.com/wiki/List_of_Doofenshmirtz%27s_schemes_and_inventions