1. Allison H (1979) Inverse unstable problems and some of their applications. Math Sci 4:3–30
2. Aster RC, Borchers B, Thurber CH (2005) Parameter estimation and inverse problems. Elsevier, Amsterdam, p 298
3. Batu V (2006) Applied flow and solute transport modeling in aquifers: fundamental principles and analytical and numerical methods. CRC Press, Taylor and Francis Group, Boca Raton, p 667
4. Beven K (1989) Changing ideas in hydrology—the case of physically-based models. J Hydrol 105:157–172
5. Beven K (2005) On the concept of model structural error. Water Sci Technol 52(6):167–175 IWA Publishing