Rimes CA, Farmer AM, Howell D l. A survey of the threat of surface water acidification to the nature conservation interest of fresh-waters on Sites of Special Scientific Interest in Britain. Aquatic Conservation - Marine and Freshwater Ecosystems . 1994  ;4:31-44.

Bissett K, Farmer AM. SSSIs in England at risk from acid rain. Peterborough; 1993.

Farmer AM, Bell JNB, Bates JW. Seasonal variations in acidic pollutant inputs and their effects on the chemistry of stemflow, bark and epiphyte tissues in three oak woodlands in N.W. Britain. New Phytologist. 1991  ;118:441-451.