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@article{10_4064_cm_57_1_137_143, author = {H. W. Pu and H. H. Pu}, title = {Pseudo-symmetric differentiation}, journal = {Colloquium Mathematicum}, pages = {137--143}, publisher = {mathdoc}, volume = {57}, number = {1}, year = {1989}, doi = {10.4064/cm-57-1-137-143}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-57-1-137-143/} }
H. W. Pu; H. H. Pu. Pseudo-symmetric differentiation. Colloquium Mathematicum, Tome 57 (1989) no. 1, pp. 137-143. doi : 10.4064/cm-57-1-137-143. http://geodesic.mathdoc.fr/articles/10.4064/cm-57-1-137-143/
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