@article {Labina2007,
	title = {A chromosomal study of 11 species of Psyllinea (Insecta: Homoptera)},
	journal = {Comparative cytogenetics},
	volume = {1},
	number = {2},
	year = {2007},
	pages = {149{\textendash}154},
	keywords = {Bulgaria, karyotypes, psyllinea, sex chromosome systems},
	author = {Labina, E. S.}
}
