@article{05165907, title = {Universal norms of }, journal = {Documenta Mathematica}, volume = {12}, year = {2007}, pages = {551-565}, zbl = {1125.11065}, language = {en}, url = {http://dml.mathdoc.fr/item/05165907} }
Kato, Kazuya. Universal norms of . Documenta Mathematica, Tome 12 (2007) pp. 551-565. http://gdmltest.u-ga.fr/item/05165907/