@article{RSMUP_1999__101__63_0, author = {Firlej, B. and Le\'sniewicz, M. and Rempulska, L.}, title = {Approximation of functions of two variables by some operators in weighted spaces}, journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova}, volume = {102}, year = {1999}, pages = {63-82}, mrnumber = {1705280}, zbl = {0934.41017}, language = {en}, url = {http://dml.mathdoc.fr/item/RSMUP_1999__101__63_0} }
Firlej, B.; Leśniewicz, M.; Rempulska, L. Approximation of functions of two variables by some operators in weighted spaces. Rendiconti del Seminario Matematico della Università di Padova, Tome 102 (1999) pp. 63-82. http://gdmltest.u-ga.fr/item/RSMUP_1999__101__63_0/
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