@article{EJDE_1996__1996_11_a0,
     author = {Pflaum, Christoph},
     title = {On the regularity of elliptic differential equations using symmetry techniques and suitable discrete spaces},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {1996},
     number = {11},
     year = {1996},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_1996__1996_11_a0/}
}