Porcelli, F. and 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. Auckland, New Zealand, 3878(1), pp. 61–74. doi: 10.11646/zootaxa.3878.1.5.