McNeill, M. and Fletcher, C. (2005) “Interspecific competition between <i>Rhinocyllus conicus</i> and <i>Urophora soistitialis</i> L on nodding thistle in Canterbury”, New Zealand Plant Protection. Auckland, New Zealand, 58, pp. 140–147. doi: 10.30843/nzpp.2005.58.4319.