@article{sbmlLevel2Version4Release1,
  title = {{Systems Biology Markup Language} ({SBML}) {Level} 2: Structures and Facilities for Model Definitions},
  author = {Hucka, Michael and Hoops, Stephan and Keating, Sarah M and Le Nov{\`e}re, Nicolas and Sahle, Sven and Wilkinson, Darren J},
  year = {2008},
  url = {http://precedings.nature.com/documents/2715/version/1},
  journal = {Nature Preceedings},
}