On the power of a prime dividing the order of the automorphism group of a finite group
Glasgow mathematical journal, Tome 4 (1960) no. 4, pp. 163-170

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The existence of a function g of hhaving the property that pr divides the order of the automorphism group of a finite group G whenever pg divides the order of G was first established by Ledermann and Neumann [4], who showed that the least such function g(h) satisfies the inequalityLater Green [2] improved this estimate toIn the Present paper this will be revised, for sufficiently large h, to
Howarth, J. C. On the power of a prime dividing the order of the automorphism group of a finite group. Glasgow mathematical journal, Tome 4 (1960) no. 4, pp. 163-170. doi: 10.1017/S2040618500034109
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