Wongthamwanich, N., Panha, S., Sierwald, P., Wesener, T. and Thirakhupt, K. 2012. A new species of the giant pill-millipede genus Sphaerobelum Verhoeff, 1924 from northern Thailand, with an extensive description and molecular characters (Diplopoda: Sphaerotheriida: Zephroniidae) . Zootaxa. 3220, 1 (Mar. 2012), 29–43. DOI:https://doi.org/10.11646/zootaxa.3220.1.2.