K. Nishii, G. Kokubugata, M. Möller, and H. J. Atkins, “NOTES ON CYRTANDRA (GESNERIACEAE) FROM JAPAN, TAIWAN AND BATAN ISLAND (PHILIPPINES)”, Edinburgh J. Bot., vol. 76, no. 3, pp. 333–344, May 2019, doi: 10.1017/S0960428619000106.