@article{NUMA_1986__49_133096,
     author = {R. Rannacher and H. Blum and Q. Lin},
     title = {Asymptotic {Error} {Expansion} and {Richardson} {Extrapolation} for {Linear} {Finite} {Elements.}},
     journal = {Numerische Mathematik},
     pages = {11--38},
     publisher = {mathdoc},
     volume = {49},
     year = {1986},
     zbl = {0594.65082},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1986__49_133096/}
}