DeBach, P., & Fisher, R.W. 1956 Experimental evidence for sibling species in the oleander scale, Aspidiotus hederae (Vallot).. Annals of the Entomological Society of America 49: 235-239.

Notes: Reports on experiments with unisexual and bisexual "races" or populations that have both been identified as A. hederae; conclusion - "races" biologically distinct.