Dong, Shi-Yong, and Andi Maryani A. Mustapeng. 2023. “Cyathea arjae, a New Synonym of Sphaeropteris elliptica (Cyatheaceae)”. Phytotaxa 630 (2). Auckland, New Zealand:163-65. https://doi.org/10.11646/phytotaxa.630.2.9.