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. 2165, 1 (Jul. 2009), 1–15. DOI:https://doi.org/10.11646/zootaxa.2165.1.1.