Nejsum, P., Bertelsen, M. F., Betson, M., Stothard, J. R., & Murrell, K. D. Molecular evidence for sustained transmission of zoonotic Ascaris suum among zoo chimpanzees (Pan troglodytes). VETERINARY PARASITOLOGY, 171(3-4), 273-276. https://doi.org/10.1016/j.vetpar.2010.03.030