@article{Laack1984,
  author    = {Laack, Walter van},
  title     = {Juvenile Osteochondronekrosen - Wesen und m{\"o}gliche Entstehungsursachen},
  series = {Zeitschrift f{\"u}r Allgemeinmedizin ; ZFA. 60 (1984)},
  journal   = {Zeitschrift f{\"u}r Allgemeinmedizin ; ZFA. 60 (1984)},
  isbn      = {0341-9835},
  pages     = {1432},
  year      = {1984},
  language  = {de}
}
@article{LaackRefischOhnsorgeetal.1984,
  author    = {Laack, Walter van and Refisch, A. and Ohnsorge, J. and D{\"u}rselen, L.},
  title     = {Proximaler Femurteilersatz - Alternative zum Schaftwechsel zementfixierter H{\"u}ftendoprothesen},
  series = {Orthop{\"a}dische Praxis. 20 (1984), H. 11},
  journal   = {Orthop{\"a}dische Praxis. 20 (1984), H. 11},
  isbn      = {0030-588x},
  pages     = {856},
  year      = {1984},
  language  = {de}
}