Porcelli, F., & Pellizzari, G. (2014). Description of female nymphal instars and adult female of Kermes echinatus Balachowsky (Hemiptera, Coccoidea, Kermesidae) based on specimens from Crete and mainland Greece, with a discussion on geographical variation. Zootaxa, 3878(1), 61–74. https://doi.org/10.11646/zootaxa.3878.1.5