Jin, Wei-Tao; Jin, Xiao-Hua; Schuiteman, André; Li, De-Zhu; Xiang, Xiao-Guo; Huang, Wei-Chang; Li, Jian-Wu; Huang, Lu-Qi (2014). «Molecular systematics of subtribe Orchidinae and Asian taxa of Habenariinae (Orchideae, Orchidaceae) based on plastid matK, rbcL and nuclear ITS». Molecular Phylogenetics and Evolution77: 41–53. PMID24747003. doi:10.1016/j.ympev.2014.04.004.
dokumen.pub
Torleif Ingelög, Roger Andersson og Martin Tjernberg, red. (1993). Red Data Book of the Baltic Region (på engelsk). Swedish Threatened Species Unit. Uppsala in co-operation with Institute of Biology, Riga. s. 25-68. ISBN91-88506-00-2. Henta 2. februar 2023.