1. Aitkenhead N, Barclay WJ, Brandon A, Chadwick RA, Chisholm JI, Cooper AH, Johnson EW, Chapman GR, Cheney CS, Colman TB, Highley DE, Lott GK, Pharaoh TC, Riley NJ, Waters CN, Warrington G (2002) British Regional geology: the Pennines and adjacent areas. British Geological Survey Nottingham, p 206
2. Arthurton RS, Johnson EW, Mundy DJC (1988) Geology of the country around Settle. Memr Brit Geol Surv, Sheet 60. HMSO, London, p 147
3. Atherden M (2013) Holocene environments. In: Waltham T, Lowe D (eds) Caves and Karst of the Yorkshire Dales, vol 1. British Cave Research Association, Buxton, pp 187–198
4. Barany-Kevei I, Goldie H, Hoyk E, Zseni A (2001) Heavy metal content of some Hungarian and English karst soils. Acta Climat Chorol Univ Szeged 34–35:81–92
5. Bögli A (1960) Kalklosung und karrenbildung. Z Geomorph NF, Suppl 2:4–21