@article{02168615, title = {Shape-preserving multivariate polynomial approximation in }, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {2004}, year = {2004}, pages = {325-333}, doi = {10.1155/S0161171204306137}, zbl = {1073.41004}, language = {en}, url = {http://dml.mathdoc.fr/item/02168615} }
Gal, Ciprian S.; Gal, Sorin G. Shape-preserving multivariate polynomial approximation in . International Journal of Mathematics and Mathematical Sciences, Tome 2004 (2004) pp. 325-333. doi : 10.1155/S0161171204306137. http://gdmltest.u-ga.fr/item/02168615/