A. V. Stekolshchikov and S. V. Buga, “The taxonomic status of Aphis rostellum (Zhang, Chen, Zhong & Li, 1999) and description of the fundatrix and sexual morphs of Aphis umbrella (Börner, 1950) (Hemiptera: Aphidoidea)”, Zootaxa, vol. 4347, no. 3, pp. 543–552, Nov. 2017.