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@article{NUMA_1974__23_132295, author = {J.T. King}, title = {New {Error} {Bounds} for the {Penalty} {Method} and {Extrapolation.}}, journal = {Numerische Mathematik}, pages = {153--166}, publisher = {mathdoc}, volume = {23}, year = {1974}, zbl = {0272.65092}, url = {http://geodesic.mathdoc.fr/item/NUMA_1974__23_132295/} }
J.T. King. New Error Bounds for the Penalty Method and Extrapolation.. Numerische Mathematik, Tome 23 (1974), pp. 153-166. http://geodesic.mathdoc.fr/item/NUMA_1974__23_132295/