@article{JCA_1998_5_2_a6,
     author = {R. R. Phelps and S. Simons},
     title = {Unbounded {Linear} {Monotone} {Operators} on {Nonreflexive} {Banach} {Spaces}},
     journal = {Journal of convex analysis},
     pages = {303--328},
     year = {1998},
     volume = {5},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/JCA_1998_5_2_a6/}
}