Template:Pridgeon et al., 1997
- Pridgeon, A.M., Bateman, R.M., Cox, A.V., Hapeman & Chase, M.W. 1997. Phylogenetics of subtribe Orchidinae (Orchidoideae, Orchidaceae) based on nuclear ITS sequences. 1. Intergeneric relationships and polyphyly of Orchis sensu lato. Lindleyana 12(2): 89–109.