@inproceedings{escidoc:0715, title = {{Hard magnetic hollow nanospheres}}, author = {Goll, D. and Berkowitz, A. E. and Bertram, H. N.}, booktitle = {{Proceedings of the 18th International Workshop on Rare-Earth Magnets and their Applications}}, pages = {704--707}, publisher = {Laboratoire de Cristallographie/Laboratoire Louis Neel, CNRS}, address = {Grenoble}, year = {2004}, doi = {} }