@article{oai:repository.dl.itc.u-tokyo.ac.jp:00040075,
 author = {Yasuda, Seidai},
 issue = {2},
 journal = {Journal of mathematical sciences, the University of Tokyo},
 month = {Oct},
 pages = {199--230},
 title = {The Product Formula for Local Constants in Torsion Rings},
 volume = {16},
 year = {2009}
}