Xu, X., X. Liu, Q. Zhang, and J. Wu. “Morph-Specific Differences in Life History Traits Between the Winged and Wingless Morphs of the Aphid, <i>Sitobion avenae</I> (Fabricius) (Hemiptera: Aphididae)”. Entomologica Fennica, vol. 22, no. 1, June 2011, pp. 56-64, doi:10.33338/ef.84543.