http://www.php-fig.org/psr/psr-4/

http://www.php-fig.org/psr/psr-0/

http://alanstorm.com/laravel_composer_autoloading

http://alanstorm.com/composer_autoloader_part_1

http://alanstorm.com/composer_autoloader_features_part_2

http://daylerees.com/composer-primer