symfony/symfony-docs — pull request #1869 by WouterJ (2012-10-30 18:38:05+00:00)
Title: Added link to cookbook article

It wasn't clear where you'll learn more about mulitple instances. I couldn't find it and after searching on google I found [others can't found it too](http://stackoverflow.com/questions/9869603/symfony-2-service-with-multiple-instances). So I added a link to the correct cookbook article.