Bol, R.; Ostle, N. J.; Chenu, C. C.; Petzke, K.-J.; Werner, R. A.; Balesdent, J.: Long term changes in the distribution and δ ¹⁵N values of individual soil amino acids in the absence of plant and fertiliser inputs. Isotopes in Environmental and Health Studies 40 (4), S. 243 - 256 (2004)

Gehre, M.; Geilmann, H.; Richter, J.; Werner, R. A.; Brand, W. A.: Continuous flow ²H/²H and ¹⁸O/¹⁶O analysis of water samples with dual inlet precision. Rapid Communications in Mass Spectrometry 18 (22), S. 2650 - 2660 (2004)

Ghosh, P.; Brand, W. A.: The effect of N₂O on the isotopic composition of air-CO₂ samples. Rapid Communications in Mass Spectrometry 18 (16), S. 1830 - 1838 (2004)

Hobbie, E. A.; Werner, R. A.: Intramolecular, compound-specific, and bulk carbon isotope patterns in C₃ and C₄ plants: a review and synthesis. New Phytologist 161 (2), S. 371 - 385 (2004)

Knohl, A.; Werner, R. A.; Geilmann, H.; Brand, W. A.: Kel-F(TM) discs improve storage time of canopy air samples in 10-mL vials for CO₂-δ¹³C analysis. Rapid Communications in Mass Spectrometry 18 (14), S. 1663 - 1665 (2004)

Seibt, U.; Brand, W. A.; Heimann, M.; Lloyd, J.; Severinghaus, J. P.; Wingate, L.: Observations of O₂:CO₂ exchange ratios during ecosystem gas exchange. Global Biogeochemical Cycles 18 (4), S. GB4024 (2004)

Starck, J. M.; Moser, P.; Werner, R. A.; Linke, P.: Pythons metabolize prey to fuel the response to feeding. Proceedings of the Royal Society B: Biological Sciences 271 (1542), S. 903 - 908 (2004)

Sturm, P.; Leuenberger, M.; Sirignano, C.; Neubert, R. E. M.; Meijer, H. A. J.; Langenfelds, R.; Brand, W. A.; Tohjiama, Y.: Permeation of atmospheric gases through polymer O-rings used in flasks for air sampling. Journal of Geophysical Research: Atmospheres 109 (D4), D04309 (2004)

Brooks, P. D.; Geilmann, H.; Werner, R. A.; Brand, W. A.: Improved precision of coupled δ¹³C and δ¹⁵N measurements from single samples using an elemental analyzer/isotope ratio mass spectrometer combination with a post-column sixport valve and selective CO₂ trapping; improved halide robustness of the combustion reactor using CeO₂. Rapid Communications in Mass Spectrometry 17 (16), S. 1924 - 1926 (2003)

Dörr, M.; Käßbohrer, J.; Grunert, R.; Kreisel, G.; Brand, W. A.; Werner, R. A.; Geilmann, H.; Apfel, C.; Robl, C.; Weigand, W.: A possible prebiotic formation of ammonia from dinitrogen on iron sulfide surfaces. Angewandte Chemie International Edition 42 (13), S. 1540 - 1543 (2003)