Marshall, S.a., S.p.l. Luk, and H. Dong. “A Revision of the New Zealand Species of Howickia Richards”. Zootaxa 3887, no. 1 (November 21, 2014): 1–36. Accessed April 30, 2025. https://mapress.com/zt/article/view/zootaxa.3887.1.1.