@article{BallachOppenheimerMooi2014,
  author    = {Hans-Joachim Ballach and Simone Oppenheimer and Jan Mooi},
  title     = {Reactions of cloned poplars to air pollution: Premature leaf loss and investigations of the nitrogen metabolism},
  journal   = {Zeitschrift f{\"u}r Naturforschung, C},
  volume    = {47.1992},
  number    = {1-2},
  pages     = {109 -- 119},
  doi       = {10.1515/znc-1992-1-219},
  year      = {2014},
}