1. Solving unconfined groundwater flow management problems with successive linear programming;Ahlfeld;J. Water Resour. Plan. Manag.,2008
2. Optimal Management of Flow in Groundwater Systems;Ahlfeld,2000
3. GWM–A Ground-water Management Process for the U.S. Geological Survey Modular Ground-water Model (MODFLOW-2000);Ahlfeld,2005
4. GWM-2005 – a Groundwater-management Process for MODFLOW-2005 with Local Grid Refinement (LGR) Capability;Ahlfeld,2009
5. A comprehensive surface-groundwater flow model;Arnold;J. Hydrol.,1993