@article{HeilmannKlinnertBechmann1996,
  author    = {Heilmann, Dieter and Klinnert, Silke and Bechmann, Wolfgang},
  title     = {Untersuchung der organischen Bodensubstanz in Rieselfeldsubstraten mittels IR-Spektroskopie},
  year      = {1996},
  language  = {de}
}
@article{ThomasBruehlHeilmannetal.1997,
  author    = {Thomas, Steffen and Br{\"u}hl, Iris and Heilmann, Dieter and Kleinpeter, Erich},
  title     = {13 C NMR Chemical shift calculations for some substituted pyridines - a comparative consideration},
  year      = {1997},
  language  = {en}
}