* Griffiths HM, Sinclair WA, Smart CD, Davis RE (1999) The phytoplasma associated with ash yellows and lilac witches-broom: 'Candidatus phytoplasma fraxini'. International Journal of Systematic Bacteriology 49(4), 1605-1614.
* Ben-Dov Y, German V (2003) A systemic catalogue of the Diaspididae (armoured scale insects) of the world, subfamilies Aspidiotinae, Comstockiellinae and Odonaspidinae. Intercept Ltd, Andover UK, 1111 pp.
------- As Syringa amurensis.