@article{JCA_2015_22_2_JCA_2015_22_2_a2,
     author = {G. E. Ivanov},
     title = {Weak {Convexity} of {Sets} and {Functions} in a {Banach} {Space}},
     journal = {Journal of convex analysis},
     pages = {365--398},
     year = {2015},
     volume = {22},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/JCA_2015_22_2_JCA_2015_22_2_a2/}
}