Kandungan gingerol dan shogaol, intensitas kepedasan dan penerimaan panelis terhadap oleoresin jahe gajah (Zingiber officinale var. Roscoe), Jahe Emprit (Zingiber officinale var. Amarum), dan Jahe Merah (Zingiber officinale var. Rubrum) - Fathona, Difa (Bogor Agricultural University (IPB), 2011)