Anon. "Geology and geomorphology". Limestone Pavement Conservation. UK and Ireland Biodiversity Action Plan Steering Group. Archived from the original on 7 August 2011. Retrieved 30 May 2011.
Anon. "Geology and geomorphology". Limestone Pavement Conservation. UK and Ireland Biodiversity Action Plan Steering Group. Archived from the original on 7 August 2011. Retrieved 30 May 2011.