Walker, M.K., B.G. Howlett, J.A. McCallum, A.R. Wallace, and D.A.J. Teulon. 2009. “Small Arthropods As Pollinators in a New Zealand Pak Choi Field Trial”. New Zealand Plant Protection 62 (August). Auckland, New Zealand:92-98. https://doi.org/10.30843/nzpp.2009.62.4791.