Authored:

<bibtex>
    @MISC{ R-HSA-74080.1,
           author          = {Schmidt, EE},
           title           = {PDE activation},
           crossref        = {Reactome:R-HSA-74080.1},
           howpublished    = {\url{http://www.reactome.org/PathwayBrowser/#R-HSA-74080.1}},
           note            = {Reactome Pathway Knowledgebase, http://www.reactome.org/},
           month           = {July},
           year            = {2003},
           }
</bibtex>