@article{GDZPPN001183796,
title = {A Characterization of Multivariate Quasi-interpolation Formulas and its Applications.},
journal = {Numerische Mathematik},
volume = {58},
year = {1990},
pages = {105-122},
zbl = {0693.41001},
url = {http://dml.mathdoc.fr/item/GDZPPN001183796}
}
Chui, Charles K.; Diamond, H. A Characterization of Multivariate Quasi-interpolation Formulas and its Applications.. Numerische Mathematik, Tome 58 (1990) pp. 105-122. http://gdmltest.u-ga.fr/item/GDZPPN001183796/