For Dipsacus
Ferguson, I.K. 1965. The genera of Valerianaceae and Dipsacaceae in the southeastern United States. J. Arnold Arb. 46: 218-231. Google Scholar
Ferguson, I.K., and G.K. Brizicky. 1965. Nomenclatural notes on Dipsacus fullonum and Dipsacus sativus. J. Arnold Arb. 46: 362-365. Google Scholar
Mayer, V. 2016. Dipsacaceae (inclusive Triplostegia). In Kadereit, J.W., and V. Bittrich. 2016. The families and genera of flowering plants. XIV. Flowering plants – Eudicots – Aquifoliales, Boraginales, Bruniales, Dipsacales, Escalloniales, Garryales, Paracryphiales, Solanales (except Convolvulaceae), Icacinaceae, Metteniusaceae, Vahliaceae. Springer, Berlin. 412 pp. Google Scholar
Stace, C. 2021. New flora of the British Isles, fourth edition, October 2021 reprinting with corrections. C & M Floristics, Suffolk, U.K. 1266 pp. Google Scholar