@article{NUMA_1987__51_133183,
     author = {John W. Barrett and Charles M. Elliott},
     title = {A {Practical} {Finite} {Element} {Approximation} of a {Semi-Definite} {Neumann} {Problem} on a {Curved} {Domain.}},
     journal = {Numerische Mathematik},
     pages = {23--36},
     publisher = {mathdoc},
     volume = {51},
     year = {1987},
     zbl = {0617.65110},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1987__51_133183/}
}