K.F.Chung (Allan) 2007 - Chung K-F (2007) Inclusion of the South Pacific Alpine Genus Oreomyrrhis (Apiaceae) in Chaerophyllum Based on Nuclear and Chloroplast DNA Sequences. Systematic Botany 32: 671-681. doi: 10.1600/036364407782250517.
There is no corrections for Chaerophyllum colensoi var. delicatulum yet.