- ^ Kakutani, Michiko. " 'Birthday Letters': A Portrait of Plath in Poetry for Its Own Sake." 1998. 
- ^ Liukkonen, Petri. "Ted Hughes (1930-1998)". Books and Writers (kirjasto.sci.fi). Finland: Kuusankoski Public Library. Archived from the original on 5 December 2014.
- ^ Parini, Jay. "Bitter fame." 1998 Archived March 27, 2009, at the Wayback Machine.
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