Walker, M.K., B.G. Howlett, J.A. McCallum, A.R. Wallace, and D.A.J. Teulon. “Small Arthropods As Pollinators in a New Zealand Pak Choi Field Trial”. New Zealand Plant Protection 62 (August 1, 2009): 92–98. Accessed May 21, 2024. https://journal.nzpps.org/index.php/nzpp/article/view/4791.