@article{05063729,
title = {Trivariate approximation operators on cube by parametric extensions.},
journal = {Acta Universitatis Apulensis. Mathematics - Informatics},
volume = {4},
year = {2002},
pages = {29-36},
zbl = {1101.41024},
language = {en},
url = {http://dml.mathdoc.fr/item/05063729}
}
Cătinaş, Teodora. Trivariate approximation operators on cube by parametric extensions.. Acta Universitatis Apulensis. Mathematics - Informatics, Tome 4 (2002) pp. 29-36. http://gdmltest.u-ga.fr/item/05063729/