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- Common Plantain, from Mrs. Grieve's herbal
- Medicinal uses of P. major in Armenia
- Additional information about psyllium, including growing procedure and economic value
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- https://web.archive.org/web/20130517194115/http://www.ars-grin.gov/cgi-bin/npgs/html/taxon.pl?19656 - USDA, ARS, National Genetic Resources Program. Plantago subg. Bougueria in the Germplasm Resources Information Network (GRIN), US Department of Agriculture Agricultural Research Service. Accessed on 07-Oct-06.
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