McCartney AG, Harriman R, Watt AW, Moore DW, Taylor EM, Collen P, Keay EJ. Long-term trends in pH, aluminium and dissolved organic carbon in Scottish fresh waters; implications for brown trout (Salmo trutta) survival. Science of The Total Environment. 2003  ;310:133-141.

Harriman R, Morrison BRS, Caines LA, Collen P, Watt AW. Long-term changes in fish populations of acid streams and lochs in Galloway south West Scotland. Water, Air and Soil Pollution. 1987  ;32:89-112.