Wurms, K.V., et al. “Suitability of Phenylalanine Ammonia Lyase and Chitinase Activities As Biochemical Markers of Soft Rot Resistance in Actinidia Chinensis Kiwifruit”. New Zealand Plant Protection, vol. 60, Aug. 2007, pp. 228-34, https://doi.org/10.30843/nzpp.2007.60.4615.