@article{NUMA_1986__50_133178,
     author = {R\"udiger Verf\"urth},
     title = {Mixed {Finite} {Element} {Approximation} of the {Vector} {Potential.}},
     journal = {Numerische Mathematik},
     pages = {685--696},
     publisher = {mathdoc},
     volume = {50},
     year = {1986},
     zbl = {0596.76073},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1986__50_133178/}
}