Hexagonal symfony
Understanding craftsmanship
Test, transform, refactor
Pair Programming, TDD and other impractical things
Full stack BDD for Symfony2
Deliberate practice
PHPSpec BDD Framework
BDD For Zend Framework With PHPSpec
PhpSpec 2.0 ilustrated by examples
Emergent design with phpspec
Mocking Demystified
The framework as an implementation detail
Introducing Eager Design