Stafford, Peter J.; Sutton, David A. (1994). Pollen morphology of the Cyclantherinae C. Jeffr. (tribe Sicyeae Schrad., Cucurbitaceae) and its taxonomic significance. Acta Botanica Gallica. 141 (2): 171—182. Bibcode:1994AcBG..141..171S. doi:10.1080/12538078.1994.10515149.
Stafford, Peter J.; Sutton, David A. (1994). Pollen morphology of the Cyclantherinae C. Jeffr. (tribe Sicyeae Schrad., Cucurbitaceae) and its taxonomic significance. Acta Botanica Gallica. 141 (2): 171—182. Bibcode:1994AcBG..141..171S. doi:10.1080/12538078.1994.10515149.