H. D.  Jones, Johns, P. M., and Winsor, L., ?The proposed synonymy of Parakontikia ventrolineata (Dendy, 1892) and Kontikia mexicana (Hyman, 1939) - what is a penis papilla??, Hydrobiologia, vol. 383, pp. 91-96, 1998.

P. M.  Johns, Boag, B., and Yeates, G. W., ?Observations on the geographic distribution of flatworms (Turbellaria: Rhynchodemidae, Bipaliidae, Geoplanidae) in New Zealand?, Pedobiologia, vol. 42, pp. 469-476, 1998.