Hough, E.G., I.J. Horner, and M.B. Horner. “Determination of Potential Alternate Hosts for Violet Root Rot in Ohakune Carrot Fields”. New Zealand Plant Protection 700 (July 31, 2017): 325. Accessed July 17, 2019. https://journal.nzpps.org/index.php/nzpp/article/view/95.