Corbet, A.S. (1951). Proposed use of the Plenary Powers to suppress the trivial name ajax Linnaeus, 1758 (as published in the binomial combination Papilio ajax) commonly but incorrectly applied to the species named Papilio marcellus by Cramer in 1777 (Class Insecta, Order Lepidoptera). The Bulletin of Zoological Nomenclature2(1): 26-29.
Hemming, A.F. (1951). On the proposal that the trivial name ajax Linnaeus, 1758 (as published in the binomial combination Papilio ajax) should be suppressed by the International Commission on Zoological Nomenclature under its Plenary Powers. The Bulletin of Zoological Nomenclature2(1): 29-30.