Zeitoun D. G. and Thierry Dana-Picard, Accurate Visualization of Graphs of Functions of Two Real Variables. journal = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology. July 2010, vol. 43(7). 960 - 970 [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/585.