Tan, J.-B., Jia, S.-B., He, X.-J., & Ma, X.-G. (2020).

Accommodating Haplosphaera in Hansenia (Apiaceae) based on morphological and molecular evidence

. Phytotaxa, 464(3), 207–216. https://doi.org/10.11646/phytotaxa.464.3.2