Plantago australis hirtella (Kunth) Rahn
| Botanical Observations on the Mexican Flora, Especially on the Flora of the Valley of Mexico John W Harshberger (1898) Proceedings of The Academy of Natural Sciences of Philadelphia 50: 372-413 | |
| A flora of the San Bruno Mountains San Mateo County, California Elizabeth Mcclintock and Neil Fahy (1968) Proceedings of the California Academy of Sciences 32: 587-677 | |
| Study of the Flora of Rucamanque, Cautin Province, Chile Carlos Ramirez, Enrique Hauenstein et al. (1989) Annals of the Missouri Botanical Garden 76: 444-453 |