@article{BaumannEckermannKrauseetal.1994,
  author    = {Ingrid Baumann and Nora Eckermann and Udo Krause and Guido Baumann},
  title     = {Effects of sucrose in the culture medium on cytological characteristics, pigments and photosynthetic activity of green callus cultures of sugar beet},
  year      = {1994},
}