@article{1206454451, author = {Ozawa, Tohru}, title = {Nonexistence of positive commutators}, journal = {Hiroshima Math. J.}, volume = {20}, number = {3}, year = {1990}, pages = { 209-211}, language = {en}, url = {http://dml.mathdoc.fr/item/1206454451} }
Ozawa, Tohru. Nonexistence of positive commutators. Hiroshima Math. J., Tome 20 (1990) no. 3, pp. 209-211. http://gdmltest.u-ga.fr/item/1206454451/