1. Ackerman, J., 1986. Coping with the epiphytic existence: pollination strategies. Selbyana 9, 52–60. http://www.jstor.org/stable/41888785.
2. Effects of Pleistocene glaciations and rivers on the population structure of Bornean orangutans (Pongo pygmaeus);Arora;Proc. Natl. Acad. Sci. USA,2010
3. Ashokan, A., 2020. Phylogenetic systematics, historical biogeography and character evolution in the taxonomically complex genus Hedychium J.Koenig (Zingiberaceae). Doctoral dissertation. Indian Institute of Science Education and Research Bhopal, Madhya Pradesh.
4. Diversity of the Genus Hedychium J. Koenig (Zingiberaceae) in Northeast India- III: Arunachal Pradesh;Ashokan;HSI Bulletin,2020
5. Ashokan, A., Gowda, V., 2019. Hedychium ziroense (Zingiberaceae), a new species of ginger lily from Northeast India. PhytoKeys 117, 73–84. 10.3897/phytokeys.117.24951.