%0 Journal Article %A M. Takesaki %T Duality in properly infinite von Neumann algebras %J Informatics and Automation %D 1975 %P 251-253 %V 136 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1975_136_a17/ %G en %F TRSPY_1975_136_a17