@article{oai:tsukuba.repo.nii.ac.jp:00029805, author = {Nishitani, Tatsuo and Vaillant, Jean}, issue = {2}, journal = {Tsukuba Journal of Mathematics}, month = {Dec}, pages = {259--271}, title = {Smoothly symmetrizable complex systems and the real reduced dimension}, volume = {30}, year = {2006} }