@article{AFM_1997_22_2_a4,
     author = {Tord Sj\"odin},
     title = {Thinness in non-linear potential theory for non-isotropic {Sobolev} spaces},
     journal = {Annales Fennici Mathematici},
     pages = {313--338},
     publisher = {mathdoc},
     volume = {22},
     number = {2},
     year = {1997},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AFM_1997_22_2_a4/}
}