Booth، H.J. (2002). "Same-sex desire, ethics and double-mindedness: The correspondence of Henry Graham Dakyns, Henry Sidgwick and John Addington Symonds". Journal of European Studies. ج. 32 ع. 125–126: 283–301. DOI:10.1177/004724410203212514. S2CID:161792773.
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Booth، H.J. (2002). "Same-sex desire, ethics and double-mindedness: The correspondence of Henry Graham Dakyns, Henry Sidgwick and John Addington Symonds". Journal of European Studies. ج. 32 ع. 125–126: 283–301. DOI:10.1177/004724410203212514. S2CID:161792773.