Byoungyoon, Lee (1998). A Phylogenetic Study of Apiaceae Tribe Caucalideae (Thesis). University of Illinois at Urbana-Champaign. Retrieved 31 December 2021. Caucalidinae (Astrodaucus, Turgeniopsis, Szovitsia, Torilis, Yabea, Caucalis, Turgenia and Lisaea)