Weers, D.J. van. (2003) The porcupine Hystrix (Acanthion) brachyura punungensis subsp. nov. from Late Pleistocene fissure deposits near Punung, Java. Scripta Geologica, 126: 217-225 PDF
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van Weers, DJ (2005) A taxonomic revision of the Pleistocene Hystrix (Hystricidae, Rodentia) from Eurasia with notes on the evolution of the family. Contributions to Zoology, 74 (3/4) LINK