@article{10_4153_CMB_2003_051_5,
     author = {Borwein, Jonathan and Fitzpatrick, Simon and Girgensohn, Roland},
     title = {Subdifferentials {Whose} {Graphs} {Are} {Not} {Norm} {\texttimes} {Weak*} {Closed}},
     journal = {Canadian mathematical bulletin},
     pages = {538--545},
     year = {2003},
     volume = {46},
     number = {4},
     doi = {10.4153/CMB-2003-051-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2003-051-5/}
}