@article{NUMA_1986__48_133081,
     author = {Rolf Stenberg},
     title = {On the {Construction} of {Optimal} {Mixed} {Finite} {Element} {Methods} for the {Linear} {Elasticity} {Problem.}},
     journal = {Numerische Mathematik},
     pages = {447--462},
     publisher = {mathdoc},
     volume = {48},
     year = {1986},
     zbl = {0563.65072},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1986__48_133081/}
}