Malcolm IA, Bacon PJ, Middlemas SJ, Fryer RJ, Shilland EM, Collen P. Relationships between hydrochemistry and the presence of juvenile brown trout (Salmo trutta) in headwater streams recovering from acidification. Ecological Indicators. 2014  ;37(Part B):351-364.

Monteith DT, Evans CD, Henrys PA, Simpson GL, Malcolm IA. Trends in the hydrochemistry of acid-sensitive surface waters in the UK 1988?2008. Ecological Indicators. 2014  ;(Part B):287-303.