Robinson, A. S., Gironella, E. P., & Cervancia, J. M. (2016).

Robinson, A.S., Gironella, E.P. & Cervancia, J.M. (2016) New orchid species of Sigmatodactylus (Orchidoideae; Diurideae) and a new record of Cryptostylis carinata from central Palawan, Philippines. Phytotaxa 252 (2): 99–113.

. Phytotaxa, 257(1), 98–98. https://doi.org/10.11646/phytotaxa.257.1.8