Stufkens, M. and Bulman, S. 2002. Nasonovia ribisnigri a new aphid pest found on lettuces (Lactuca sativa) and Ribes spp in Canterbury. New Zealand Plant Protection. 55, (Aug. 2002), 437–437. DOI:https://doi.org/10.30843/nzpp.2002.55.3973.