@article{escidoc:0617,
  title = {{Magnetic ground states and the role of vortices in ferromagnetic hollow nanospheres}},
  journal = {{Physica B: Condensed Matter}},
  volume = {372},
  number = {1-2},
  pages = {282--285},
  year = {2006},
  slug = {escidoc-0617},
  author = {Goll, D. and Macke, S. and Berkowitz, A.E. and Bertram, H. N.}
}