Narayanan, S. P., Sathrumithra, S., Christopher, G., Thomas, A. and Julka, J. (2016) “Checklist of the earthworms (Oligochaeta) of Kerala, a constituent of Western Ghats biodiversity hotspot, India”, Zootaxa. Auckland, New Zealand, 4193(1), pp. 117–137. doi: 10.11646/zootaxa.4193.1.5.