@incollection{B13,
  key =		 {B13},
  author        = {Christoph Benzm\"uller and Adam Pease},
  editor        = {Adam Pease},
  booktitle     = {Ontology: A Practical Guide},
  chapter       = {Knowledge Engineering Tools},
  publisher     = {Articulate Software Press, Angwin, CA, USA},
  year          = 2011,
  pages         = {171-214},
  note          = {(This chapter has some essential overlap with the 2012 journal article with A. Pease titled \textit{Higher-Order Aspects and Context in SUMO. })}
}