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@article{MZ_1972__124_171671, author = {Dany Leviatan}, title = {On {Gamma-Type} {Approximation} {Operators.}}, journal = {Mathematische Zeitschrift}, pages = {208--212}, publisher = {mathdoc}, volume = {124}, year = {1972}, zbl = {0214.31503}, url = {http://geodesic.mathdoc.fr/item/MZ_1972__124_171671/} }
Dany Leviatan. On Gamma-Type Approximation Operators.. Mathematische Zeitschrift, Tome 124 (1972), pp. 208-212. http://geodesic.mathdoc.fr/item/MZ_1972__124_171671/