Lagos, D. M., Puttler, B., Voegtlin, D. J., & Giordano, R. (2012). A new species of Aphis (Hemiptera:Aphididae) in Missouri on St. John’s Wort, Hypericum kalmianum, and re-description of Aphis hyperici Monell. Zootaxa, 3478(1), 81–92. https://doi.org/10.11646/zootaxa.3478.1.10