@phdthesis{Tews2003,
  author      = {J{\"o}rg Tews},
  title       = {The impact of climate change and land use on woody plants in semiarid savanna : modelling shrub population dynamics in the southern kalahari},
  type        = {doctoralthesis},
  pages       = {98 S.},
  year        = {2003},
}