Next to many magazine articles I wrote or participated in writing some books. Next to that you'll find publications here I did during my time at university while studying computer science.
You can also find a list of the talks I gave over the recent years on this website and some articles I published in my blog.
Real-World Solutions for Developing High-Quality PHP Frameworks and Applications
Softwarequalität in PHP-Projekten
Mit Fallstudien von Firmen wie Facebook und Projekten wie TYPO3, Symfony und Zend Framework
Algorithmic learning of XML Schema definitions from XML data
Das Praxisbuch für Entwickler und Administratoren
Standardization of Ontologies
Software-Entwicklung für Profis