@article{BaumannEckermann1994,
  author    = {Baumann, Ingrid and Eckermann, Nora},
  title     = {Ploidy level and chlorophyll content of single plastids and cells from callus cultures during conversion to autotrophic growth},
  year      = {1994},
  language  = {en}
}
@article{BaumannEckermannKrauseetal.1994,
  author    = {Baumann, Ingrid and Eckermann, Nora and Krause, Udo and Baumann, Guido},
  title     = {Effects of sucrose in the culture medium on cytological characteristics, pigments and photosynthetic activity of green callus cultures of sugar beet},
  year      = {1994},
  language  = {en}
}