Authored:

<bibtex>
    @MISC{ R-HSA-69620.5,
           author          = {Hoffmann, I, Khanna, KK, Walworth, N, Yen, Tim, O'Donnell, M},
           title           = {Cell Cycle Checkpoints},
           crossref        = {Reactome:R-HSA-69620.5},
           howpublished    = {\url{http://www.reactome.org/PathwayBrowser/#R-HSA-69620.5}},
           note            = {Reactome Pathway Knowledgebase, http://www.reactome.org/},
           month           = {January},
           year            = {2005},
           }
</bibtex>