C. J. F. Ter Braak and Smilauer, P., Canoco reference manual and user's guide: software for ordination, version 5.0. Ithaca, USA: Microcomputer Power, 2012, p. 496.

E.  Sherlock, A Key to the Earthworms of the UK and Ireland. AIDGAP (Aids to the Identification of Difficult Groups of Animals and Plants). 2012.

D.  Hubble, Keys to the adults of Seed and Leaf Beetles of the British Isles AIDGAP (Aids to the Identification of Difficult Groups of Animals and Plants). Field Studies Council, 2012.

D.  Carpenter, Hammond, P. M., Sherlock, E., Lidgett, A., Leigh, K., and Eggleton, P., ?Biodiversity of soil macrofauna in the New Forest: a benchmark study across a national park landscape?, Biodiversity and Conservation, vol. 21, pp. 3385?3410, 2012.

?Ancient Woodland (England)?. 2012.