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@article{AM2_1978__18_136791, author = {Helmut Brass}, title = {Umkehrs\"atze beim {Trapezverfahren.}}, journal = {Aequationes mathematicae}, pages = {338--344}, publisher = {mathdoc}, volume = {18}, year = {1978}, zbl = {0405.65003}, url = {https://geodesic-test.mathdoc.fr/item/AM2_1978__18_136791/} }
Helmut Brass. Umkehrsätze beim Trapezverfahren.. Aequationes mathematicae, Tome 18 (1978), pp. 338-344. https://geodesic-test.mathdoc.fr/item/AM2_1978__18_136791/