@article{oai:nitech.repo.nii.ac.jp:00005328, author = {Kawasaki, Shinji and Nojima, Y. and Yokomae, T. and Okino, F. and Tohara, H.}, issue = {1-2}, journal = {Physica B: Condensed Matter}, month = {Jan}, note = {application/pdf}, pages = {59--62}, title = {Hardness of high-pressure high-temperature treated single-walled carbon nanotubes}, volume = {388}, year = {2007} }