Barker, G., Hunter, C., Stephens, A., Rutledge, D., Harris, R. and Lariviere, M.-C. (2002) “Biosecure a spatially explicit model for assessing risk association with alien organisms in New Zealand indigenous ecosystems”, New Zealand Plant Protection, 550, pp. 431-431. doi: 10.30843/nzpp.2002.55.3961.