@article{oai:tsukuba.repo.nii.ac.jp:00017659, author = {Nishitani, Tatsuo and Vaillant, Jean}, issue = {2}, journal = {Tsukuba Journal of Mathematics}, month = {Dec}, pages = {389--403}, title = {Smoothly symmetrizable systems and the reduced dimensions II}, volume = {27}, year = {2003} }