Poulsen, A. D., and B. B. Bau. “A NEW SPECIES OF ETLINGERA (ZINGIBERACEAE) FROM BOUGAINVILLE ISLAND, PAPUA NEW GUINEA”. Edinburgh Journal of Botany, vol. 74, no. 2, Feb. 2017, pp. 141-8, https://doi.org/10.1017/S0960428617000026.