Šulc, K. 1936 Die weiblichen Geschlechtsorgane von Xylococcus filiferus Loew 1882. [The female sexual organs of Xylococcus filiferus Loew 1882.]. Ceskoslovensko Zool. Spolec. Vestnik 3: 60-68.

Notes: Detailed description, reference to condition in several other scale insects.