R. Desmond Kime and Enghoff, H., Atlas of European Millipedes (Class Diplopoda). Volume 1. Orders Polyxenida, Glomerida, Platydesmida, Siphonocryptida, Polyzoniida, Callipodida, Polydesmida, vol. 1, 3 vol. Sofia: Pensoft Publishers, 2011, p. 282.