Pimvichai, P., Enghoff, H. and Panha, S. (2009) “A revision of the Thyropygus allevatus group. Part 2: the T. bifurcus subgroup (Diplopoda, Spirostreptida, Harpagophoridae)”, Zootaxa. Auckland, New Zealand, 2165(1), pp. 1–15. doi: 10.11646/zootaxa.2165.1.1.