@article{JCA_2012_19_2_JCA_2012_19_2_a2,
     author = {A. H. Hamel and C. Schrage},
     title = {Notes on {Extended} {Real-} and {Set-Valued} {Functions}},
     journal = {Journal of convex analysis},
     pages = {355--384},
     publisher = {mathdoc},
     volume = {19},
     number = {2},
     year = {2012},
     url = {http://geodesic.mathdoc.fr/item/JCA_2012_19_2_JCA_2012_19_2_a2/}
}