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@article{10_4064_cm_28_2_275_285, author = {N. K. Kundu}, title = {On approximate symmetric derivative}, journal = {Colloquium Mathematicum}, pages = {275--285}, publisher = {mathdoc}, volume = {28}, number = {2}, year = {1973}, doi = {10.4064/cm-28-2-275-285}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-28-2-275-285/} }
N. K. Kundu. On approximate symmetric derivative. Colloquium Mathematicum, Tome 28 (1973) no. 2, pp. 275-285. doi : 10.4064/cm-28-2-275-285. http://geodesic.mathdoc.fr/articles/10.4064/cm-28-2-275-285/
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