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jstor.org
Small E, Jui PY, Lefkovitch LP. A Numerical Taxonomic Analysis of Cannabis with Special Reference to Species Delimitation. Systematic Botany. 1976, 1 (1): 67–84. JSTOR 2418840. doi:10.2307/2418840.
kew.org
powo.science.kew.org
Cannabis indica Lam.. Plants of the World Online. Kew Science. [2020-12-28]. (原始内容存档于2023-01-05) (英语).