Geranium retrorsum L'Hér. ex DC.
|The genus Geranium L. in the south western Pacific area|
R C Carolin (1965) Proceedings of The Linnean Society of New South Wales 89: 326-361
|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
|Rare and biogeographically significant vascular plant species of the Eden region, south-eastern New South Wales: a listing for the 'fine-filter' approach|
D A Keith (1990) Proceedings of The Linnean Society of New South Wales 112(2): 111-132