@article{JCA_2002_9_2_JCA_2002_9_2_a5,
     author = {M. Degiovanni and R. Lucchetti and N. Ribarska},
     title = {Critical {Point} {Theory} for {Vector} {Valued} {Functions}},
     journal = {Journal of convex analysis},
     pages = {415--428},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {2002},
     url = {http://geodesic.mathdoc.fr/item/JCA_2002_9_2_JCA_2002_9_2_a5/}
}