@article{AFM_1998_23_2_a14,
     author = {M. Fuchs and Li Gongbao and O. Martio},
     title = {Second order obstacle problems for vectorial functions and integrands with subquadratic growth},
     journal = {Annales Fennici Mathematici},
     pages = {549--558},
     publisher = {mathdoc},
     volume = {23},
     number = {2},
     year = {1998},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AFM_1998_23_2_a14/}
}