1. J. Crank, 1975 . The Mathematics of Diffusion . 2nd ed. Clarendon Press, Oxford. 414 pp.
2. T. Franz, and N. Guiger . 1990 . FLOWPATH, a Two Dimensional Horizontal Aquifer Simulation Model . Waterloo Hydrogeologie Software, Waterloo, Ontario. 74 pp.
3. R. A. Freeze, and J. A. Cherry . 1979 . Groundwater . Prentice-Hall Inc., Englewood Cliffs, NJ.604 pp.
4. Pollutant migration from two sanitary landfill sites near Sarnia, Ontario