https://simpleisbetterthancomplex.com/article/2017/03/21/class-based-views-vs-function-based-views.html
https://blog.ionelmc.ro/2015/02/09/understanding-python-metaclasses/
http://makina-corpus.com/blog/metier/2014/python-tutorial-understanding-python-mro-class-search-path
https://julien.danjou.info/blog/2013/guide-python-static-class-abstract-methods
http://davidwalsh.name/valid-pseudo-classes
https://pypi.python.org/pypi/django-viewclass-mixins
http://www.pioverpi.net/2012/05/14/ajax-json-responses-using-django-class-based-views/
https://github.com/Wixel/GUMP
http://net.tutsplus.com/articles/general/a-beginners-guide-to-design-patterns/
http://code.google.com/p/xmpphp/
http://code.google.com/p/php-form-builder-class/
http://autoembed.com/
http://code.google.com/p/gapi-google-analytics-php-interface/