@article{JIPAM_2006__7_3_129440,
     author = {Pop, Ovidiu T. and Farcas, Mircea},
     title = {Approximation of {-Continuous} and {-Differentiable} functions by {GBS} operators of {Bernstein} bivariate polynomials.},
     journal = {JIPAM. Journal of Inequalities in Pure & Applied Mathematics [electronic only]},
     publisher = {mathdoc},
     volume = {7},
     number = {3},
     year = {2006},
     zbl = {1151.41005},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/JIPAM_2006__7_3_129440/}
}