@article{JCA_2011_18_1_JCA_2011_18_1_a1,
     author = {L. Bandeira and A. Ornelas},
     title = {On the {Characterization} of a {Class} of {Laminates} for 2 {\texttimes} 2 {Symmetric} {Gradients}},
     journal = {Journal of convex analysis},
     pages = {37--58},
     publisher = {mathdoc},
     volume = {18},
     number = {1},
     year = {2011},
     url = {http://geodesic.mathdoc.fr/item/JCA_2011_18_1_JCA_2011_18_1_a1/}
}