@article{oai:kitami-it.repo.nii.ac.jp:00007113, author = {B., Voigtlaender and M., Kawamura and N., Paul and V., Cherepanov}, month = {Oct}, pages = {185--189}, title = {Fabrication of Si/Ge nanorings structure by MBE}, volume = {464-465}, year = {2004} }