@article {1216,
	title = {The abundance and increase of the Sane Jos{\'e} scale Quadraspidiotus perniciosus Comst. and its natural enemy Prospaltella perniciosi Tow. A summary of 30 years{\textquoteright} investigations},
	journal = {Gesunde Pflanzen},
	volume = {42},
	number = {3},
	year = {1990},
	pages = {89-96},
	author = {Neuffer, G.}
}
