@article{NUMA_1976__26_132402,
     author = {C. Johnson},
     title = {On {Finite} {Element} {Methods} for {Plasticity} {Problems.}},
     journal = {Numerische Mathematik},
     pages = {79--84},
     publisher = {mathdoc},
     volume = {26},
     year = {1976},
     zbl = {0355.73035},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1976__26_132402/}
}