1. Böttcher, J. & Strebel, O. (1985): Redoxpotential und Eh/pH-Diagramme von Stoftamsetzungen in reduzierendem Grundwasser ( Beispiel Fuhrberger Feld ). Geologisches Jahrbuch, C 40: 3–34.
2. Böttcher, J. & Strebel, O. (1988a): Spatial variability of groundwater solute concentrations at the water table under arable land and coniferous forest. Part 1: Methods for quantifying spatial variability (geostatistics, time series analysis, Fourier transform smoothing). Z. Pflanzenernähr. Bodenk. 151: 185–190.
3. Böttcher, J. & Strebel, O. (1988b): Spatial variability of groundwater solute concentrations at the water table under arable land and coniferous forest. Part 3: Field data for a coniferous forest and statistical analysis. Z. Ptlanzenernähr. Bodenk. 151: 197–203.
4. Böttcher, J. & O. Strebel (1990): Quantification of deterministic and stochastic variability components of solute concentrations at the groundwater table in sandy soils. pp. 129–140. In K. ROTH et al. (Eds.) Field-scale water and solute flux in soils. Birkhäuser, Basel, Switzerland.
5. Böttcher, J.; Lauer, S.; Strebel O. & Puhlmann, M. (1997): Spatial variability of canopy throughfall and groundwater sulfate concentrations under a pine stand. J. Environ. Qual. 26: 503–510.