@article{NUMA_1986__50_133174,
     author = {Lucia Gastaldi and Ricardo Nochetto},
     title = {Optimal {L...-Error} {Estimates} for {Nonconforming} and {Mixed} {Finite} {Element} {Methods} of {Lowest} {Order.}},
     journal = {Numerische Mathematik},
     pages = {587--612},
     publisher = {mathdoc},
     volume = {50},
     year = {1986},
     zbl = {0597.65080},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1986__50_133174/}
}