Eman S. Bhaya, Jinan M. Hadi
      Negative theorem for monotone bivariate approximation
      International Journal of Mathematical Analysis, Vol. 8, 2014, no. 24, 1179-1185
      http://dx.doi.org/10.12988/ijma.2014.4497
Copyright © 2014 Eman S. Bhaya and Jinan M. Hadi. This article is distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.