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Piotr Ceryngier, Jerzy Romanowski. 2017.
Harmonia axyridis (Pallas, 1773) (Coleoptera: Coccinellidae) and its parasite in south-western Bulgaria and northern Greece.
BioInvasions Records, November 2017. Volume 6, Issue 4: 307-310.
DOI: https://doi.org/10.3391/bir.2017.6.4.02