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mine-explorer.co.uk
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"Blea Tarn SSSI Citation"(PDF). Sites of Special Scientific Interest. Natural England. Archived from the original(PDF) on 27 April 2012. Retrieved 13 February 2011.
"Side Pike SSSI Citation"(PDF). Sites of Special Scientific Interest. Natural England. 27 February 1997. Archived from the original(PDF) on 27 April 2012. Retrieved 13 February 2011.
Bailey, Richard; et al. (2004). Newman, Rachel (ed.). "The Early Medieval Period – Resource Assessment"(PDF). North West Region Archaeological Research Framework Early Medieval Resource Assessment Draft. Archived from the original(PDF) on 3 March 2016. Retrieved 13 February 2011.