Kuchta (1 Aralık 2015). "German Kava Ban Lifted by Court: The Alleged Hepatotoxicity of Kava (Piper methysticum) as a Case of Ill-Defined Herbal Drug Identity, Lacking Quality Control, and Misguided Regulatory Politics". Planta Medica. 81 (18): 1647-1653. doi:10.1055/s-0035-1558295. ISSN1439-0221. PMID26695707.
Showman (2015). "Contemporary Pacific and Western perspectives on 'awa (Piper methysticum) toxicology". Fitoterapia. 100: 56-67. doi:10.1016/j.fitote.2014.11.012. PMID25464054.
Kuchta (1 Aralık 2015). "German Kava Ban Lifted by Court: The Alleged Hepatotoxicity of Kava (Piper methysticum) as a Case of Ill-Defined Herbal Drug Identity, Lacking Quality Control, and Misguided Regulatory Politics". Planta Medica. 81 (18): 1647-1653. doi:10.1055/s-0035-1558295. ISSN1439-0221. PMID26695707.
Showman (2015). "Contemporary Pacific and Western perspectives on 'awa (Piper methysticum) toxicology". Fitoterapia. 100: 56-67. doi:10.1016/j.fitote.2014.11.012. PMID25464054.
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"Kava". Merriam–Webster Online Dictionary. 2018. 24 Nisan 2009 tarihinde kaynağından arşivlendi.
Kuchta (1 Aralık 2015). "German Kava Ban Lifted by Court: The Alleged Hepatotoxicity of Kava (Piper methysticum) as a Case of Ill-Defined Herbal Drug Identity, Lacking Quality Control, and Misguided Regulatory Politics". Planta Medica. 81 (18): 1647-1653. doi:10.1055/s-0035-1558295. ISSN1439-0221. PMID26695707.