@article{Zeller_2012, title={When Is a Fixed Sum Not a Fixed Sum but a Penalty Cause?}, volume={30}, url={http://jlc.law.pitt.edu/ojs/jlc/article/view/4}, DOI={10.5195/jlc.2012.4}, abstractNote={    }, number={2}, journal={Journal of Law and Commerce}, author={Zeller, Bruno}, year={2012}, month={May} }