^Parker, Charles Thomas; Taylor, Dorothea; Garrity, George M. (2009). Parker, Charles Thomas; Garrity, George M (eds.). "Taxonomy of the genus Ponticaulis Kang and Lee 2009". doi:10.1601/tx.14907 (inactive 2024-04-17). ((cite journal)): Cite journal requires |journal= (help)CS1 maint: DOI inactive as of April 2024 (link)