Reference:

Xue, Y., Bahlai, C. A., Frewin, A., Sears, M. K., Schaafsma, A. W., & Hallett, R. H., 2009. Predation by Coccinella septempunctata and Harmonia axyridis (coleoptera: Coccinellidae) on Aphis glycines (Homoptera: Aphididae). Environmental Entomology, 38(3), 708-714.

URL:

https://academic.oup.com/ee/article/38/3/708/546292

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