@article{oai:tsukuba.repo.nii.ac.jp:00017319,
 author = {Nishitani, Tatsuo and Vaillant, Jean},
 issue = {1},
 journal = {Tsukuba Journal of Mathematics},
 month = {Jun},
 pages = {165--177},
 title = {Smoothly symmetrizable systems and the reduced dimensions},
 volume = {25},
 year = {2001}
}