(1)
Hoffman, R. L. Studies on Spirostreptoid Millipeds. XVII. A Third Contribution to the Knowledge of the Genus Urostreptus Silvestri, 1897. Pap. Avulsos Zool. 1980, 33 (1-25 (1979-1980), 263-274. https://doi.org/10.11606/0031-1049.1980.33.p263-274.