@Article{roth:epis,
  author = 	 {Camille Roth and Paul Bourgine},
  title = 	 {Epistemic Communities: Description and Hierarchic Categorization},
  journal = 	 {Mathematical Population Studies},
  year = 	 2005,
  volume = 	 12,
  number = 	 2,
  pages=         {107--130},
  annote = 	 {(arXiv:nlin.AO/0409013)}
}