@article {1989, title = {An approach to the thin obstacle problem for variational functionals depending on vector}, journal = {Comm. Partial Differential Equations, 14 (1989), no.12, 1717-1743.}, number = {SISSA;41/89/M}, year = {1989}, publisher = {SISSA Library}, url = {http://hdl.handle.net/1963/802}, author = {Gianni Dal Maso and Roberta Musina} }