1. Applied Mathematics Series,1964
2. Ator, S. W. (1998), “Nitrate and Pesticide Data for Waters of the Mid-Atlantic Region,” USGS Open File Report 98-158, U.S. Geological Survey, Reston, VA.
3. Ator, S. W., and Denis, J. M. (1997), “Relation of Nitrogen and Phosphorus in Ground Water to Land Use in Four Subunits of the Potomac River Basin,” USGS Water-Resources Investigations Report 97-4268, U.S. Geological Survey, Reston, VA.
4. Ator, S. W., and Ferrari, M. J. (1997), “Nitrate and Selected Pesticides in Ground Water of the Mid-Atlantic Region,” USGS Water-Resources Investigations Report 97-4139, U.S. Geological Survey, Reston, VA.
5. Besag, J., York, J., and Mollié, A. (1991), “Bayesian Image Restoration, With Two Applications in Spatial Statistics” (with comments), Annals of the Institute of Statistical Mathematics, 43, 1–59.