@article{3556,
  author       = {Stock, Hans-Juergen and Haindl, Gabriele and Hamelmann, Frank and Menke, Detlef and Wehmeyer, Oliver and Kleineberg, Ulf and Heinzmann, Ulrich and Bulicke, Peter and Fuchs, Detlev and Ulm, Gerhard},
  issn         = {1539-4522},
  journal      = {Applied Optics},
  number       = {25},
  publisher    = {Optica Publishing Group},
  title        = {{Carbon/titanium multilayers as soft-x-ray mirrors for the water window}},
  doi          = {10.1364/AO.37.006002},
  volume       = {37},
  year         = {1998},
}

@article{3558,
  author       = {Stock, H.-J. and Hamelmann, Frank and Kleineberg, U. and Menke, D. and Schmiedeskamp, B. and Osterried, K. and Heidemann, K. F. and Heinzmann, U.},
  issn         = {1539-4522},
  journal      = {Applied Optics},
  number       = {7},
  pages        = {1650--1654},
  publisher    = {Optica Publishing Group},
  title        = {{Carbon buffer layers for smoothing superpolished glass surfaces as substrates for molybdenum/silicon multilayer soft-x-ray mirrors}},
  doi          = {10.1364/AO.36.001650},
  volume       = {36},
  year         = {1997},
}