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Hoffman, R. L. (1980). Classification of the Diplopoda. 1-237. Genève.

Jeekel, C. A. W. (1971). Nomenclator generum et familiarum Diplopodorum: A list of the genus and family-group names in the Class Diplopoda from the 10th edition of Linnaeus, 1758, to the end of 1957. Monografieen van de Nederlandse Entomologische Vereniging, 5: 1-412. Amsterdam

VandenSpiegel, D.; Golovatch, S. I.; Hamer, M. L. (2002). Revision of some of the oldest species in the millipede genus Sphaerotherium Brandt, 1833 (Diplopoda, Sphaerotheriida, Sphaerotheriidae),with new synonymies. African Invertebrates, 143-181. Pietermaritzburg

Wesener, T. (2016). The Giant Pill-Millipedes, order Sphaerotheriida –An annotated species cataloguewith morphological atlasand list of apomorphies. <em>Bonn zoological Bulletin Supplementum.</em> 63: 1-107.