The ChEBI reference database and ontology for biologically relevant chemistry: enhancements for 2013.
Janna HastingsPaula de MatosAdriano DekkerMarcus EnnisBhavana HarshaNamrata KaleVenkatesh MuthukrishnanGareth OwenSteve TurnerMark WilliamsChristoph SteinbeckPublished in: Nucleic Acids Res. (2013)