Yust, H.R., Nelson, H.D., & Busbey, R.L. 1943 Comparative susceptibility of two strains of California red scale to HCN, with special reference to the inheritance of resistance.. Journal of Economic Entomology 36(5): 744-749.

Notes: This study investigates unsatisfactory results from fumigation of Aonidiella aurantii with hydrocyanic acid.