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@article{AULFM_1989_03_a5, author = {Libicka, Inga and {\L}azarow, Ewa}, title = {The {Symetrie} {I-Approximate} {Derivatives}}, journal = {Acta Universitatis Lodziensis. Folia Mathematica}, publisher = {mathdoc}, volume = {03}, year = {1989}, language = {pl}, url = {http://geodesic.mathdoc.fr/item/AULFM_1989_03_a5/} }
Libicka, Inga; Łazarow, Ewa. The Symetrie Ι-Approximate Derivatives. Acta Universitatis Lodziensis. Folia Mathematica, Tome 03 (1989). http://geodesic.mathdoc.fr/item/AULFM_1989_03_a5/