Dickinson, Timothy A.; Sattler, Rolf (1975). "Development of the Epiphyllous Inflorescence of Helwingia japonica (Helwingiaceae)". American Journal of Botany. 62 (9): 962–973. doi:10.2307/2441641. ISSN0002-9122. JSTOR2441641.
Dickinson, T. A.; Sattler, R. (1974). "Development of the epiphyllous inflorescence of Phyllonoma integerrima (Turcz.) Loes.: implications for comparative morphology*". Botanical Journal of the Linnean Society. 69 (1): 1–13. doi:10.1111/j.1095-8339.1974.tb01609.x. ISSN1095-8339.
Hinkley, Daniel J. (1 May 2007). "Helwingia". Horticulture Magazine.
jstor.org
Dickinson, Timothy A.; Sattler, Rolf (1975). "Development of the Epiphyllous Inflorescence of Helwingia japonica (Helwingiaceae)". American Journal of Botany. 62 (9): 962–973. doi:10.2307/2441641. ISSN0002-9122. JSTOR2441641.
Dickinson, Timothy A.; Sattler, Rolf (1975). "Development of the Epiphyllous Inflorescence of Helwingia japonica (Helwingiaceae)". American Journal of Botany. 62 (9): 962–973. doi:10.2307/2441641. ISSN0002-9122. JSTOR2441641.
Dickinson, T. A.; Sattler, R. (1974). "Development of the epiphyllous inflorescence of Phyllonoma integerrima (Turcz.) Loes.: implications for comparative morphology*". Botanical Journal of the Linnean Society. 69 (1): 1–13. doi:10.1111/j.1095-8339.1974.tb01609.x. ISSN1095-8339.