Strong KM, Lennox SD, Smith RV. Predicting nitrate concentrations in Northern Ireland rivers using time series analysis. Journal of Environmental Quality. 1997  ;26:1599-1604.

Gibson CE, Smith RV, Stewart DA. nitrogen cycle in Lough Neagh, N. Ireland, 1975 to 1987. Int. Revue ges. Hydrobiol. 1992  ;77:73-83.

Smith RV, Stewart DA. A regression model for nitrate leaching in Northern Ireland. . Soil Use and Management. 1989  ;5:71-76.

Foy R, Smith RV, Stevens RJ. Identification of factors affecting nitrogen and phosphorus loadings to Lough Neagh. Journal of Environmental Management . 1982  ;15:109-129.