Reviewed:

<bibtex>
    @MISC{ R-HSA-428157.7,
           author          = {Hannun, YA, Luberto, C},
           title           = {Sphingolipid metabolism},
           crossref        = {Reactome:R-HSA-428157.7, DOI:10.3180/REACT_19323.1},
           howpublished    = {\url{http://www.reactome.org/PathwayBrowser/#R-HSA-428157.7}},
           note            = {Reactome Pathway Knowledgebase, http://www.reactome.org/},
           month           = {November},
           year            = {2009},
           }
</bibtex>