@article{HermanussenGreilBlahaetal.2001,
  author    = {Hermanussen, Michael and Greil, Holle and Blaha, Pawel and Vignerova, Jana},
  title     = {The impact of the social group on growth},
  isbn      = {3-89873-228-2},
  year      = {2001},
  language  = {en}
}
@article{StahnPietschBlahaetal.2001,
  author    = {Stahn, Jochen and Pietsch, Ullrich and Blaha, Pawel and Schwarz, K. H.},
  title     = {Electric field induced charge-density variations in covalently bonded compounds},
  year      = {2001},
  language  = {en}
}