@article{JCA_2007_14_3_JCA_2007_14_3_a7,
     author = {A. Calogero and G. Carcano and R. Pini},
     title = {Twisted {Convex} {Hulls} in the {Heisenberg} {Group}},
     journal = {Journal of convex analysis},
     pages = {607--619},
     year = {2007},
     volume = {14},
     number = {3},
     url = {http://geodesic.mathdoc.fr/item/JCA_2007_14_3_JCA_2007_14_3_a7/}
}