@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}
}
@article{Laack1986,
  author    = {Laack, Walter van},
  title     = {Allgemeine physiotherapeutische Behandlung nach H{\"u}ft- und Kniegelenkoperationen},
  series = {Physiotherapie. 77 (1986), H. 2},
  journal   = {Physiotherapie. 77 (1986), H. 2},
  isbn      = {0031-9392},
  pages     = {68 -- 72},
  year      = {1986},
  language  = {de}
}