%0 Journal Article %A Borwein, Jonathan %A Fitzpatrick, Simon %A Girgensohn, Roland %T Subdifferentials Whose Graphs Are Not Norm × Weak* Closed %J Canadian mathematical bulletin %D 2003 %P 538-545 %V 46 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-2003-051-5/ %R 10.4153/CMB-2003-051-5 %F 10_4153_CMB_2003_051_5