Da Silva, V. C. P., M. B. Kaydan, C. S. A. Da Silva-Torres, and J. B. Torres. “Mealybug Species (Hemiptera: Coccomorpha: Pseudococcidae) on Soursop and Sugar Apple (Annonaceae) in North-East Brazil, With Description of a New Species of Pseudococcus Westwood”. Zootaxa, vol. 4604, no. 3, May 2019, pp. 525–538, doi:10.11646/zootaxa.4604.3.8.