Hassemer, G. 2016. Plantago hatschbachiana (Plantaginaceae), a critically-endangered new species from sandstone grasslands in Brazil, and an updated identification key to Plantago in Brazil and Paraguay. – Phytotaxa 278: 141-52.
Hassemer, G. 2018. Notes on the montane Indo-Iranian species in Plantago subgenus Plantago (Plantaginaceae). – Phytotaxa 336: 59-68.
IUCN .2016. Guidelines for Using the IUCN Red List Categories and Criteria. Version 12. Prepared by the Standards and Petitions Subcommittee. Available from: http://www.iucnredlist.org/ documents/RedListGuidelines.pdf (accessed 8 March 2017)
Memariani, F., Zarrinpour, V. and Akhani, H. 2016. A review of plant diversity, vegetation, and phytogeography of the Khorassan-Kopet Dagh floristic province in the Irano-Turanian region (northeastern Iran–southern Turkmenistan). –Phytotaxa 249: 8-30.
Mohsenzadeh, S., Nazeri, V. and Mirtadzadini, A.S. 2007. Plantago lachnantha Bge. (Plantaginaceae), a new record for flora of Iran. – Iran. J. Bot. 13: 107-108.
Mohsenzadeh, S., Nazeri, V. and Mirtadzadini, M. 2010. A new species of Plantago (Plantaginaceae) from Iran. – Novon 20: 307-310.
Mozaffarian, V. 2007. A Dictionary of Iranian Plant Names. Farhang-e-Moaser, Tehran. pp: 417-418.
Patzak, A. and Rechinger, K. H. 1965. Plantaginaceae. – In: Rechinger, KH (ed.). Flora Iranica 15: 1-21. – Academische Druck und Verlagsantalt.
Pilger, R.K.F. 1937. Plantaginaceae. – In: Engler, H.G.A. & Diels, F.L.E. (eds.). Das Pflanzenreich. 102: 466 pp. Wilhelm Engelmann, Leipzig.
Rahn, K. 1996. A phylogenetic study of the Plantaginaceae. – Bot. J. Linn. Soc. 120: 145-198.