@article{escidoc:0686,
  title = {{Critical sizes for ferromagnetic spherical hollow nanoparticles}},
  journal = {{Physical Review B}},
  volume = {70},
  number = {18},
  year = {2004},
  slug = {escidoc-0686},
  author = {Goll, D. and Berkowitz, A. E. and Bertram, H. N.}
}