Willis, Robert
| 1977 | "Management Model for Ground-Water Development" in Journal of the Water Resources Planning and Management Division |
| 1976 | "Optimal groundwater quality management: Well injection of waste waters" in Water Resources Research |
| 1976 | "Optimal Management of the Subsurface Environment" in Hydrological Sciences Bulletin |
| 1976 | "Transient Water Quality Modeling in Streams" in Journal of the American Water Resources Association |
| 1976 | "Water Quality Modeling of Deep Reservoirs" Journal of the Water Pollution Control Federation |
| 1975 | "Steady-State Water Quality Modeling in Streams" in Journal of the Environmental Engineering Division |