Khalid Pervaiz Akhter and  Mahmood Ahmad and  Ghulam Murtaza and  Ishrat Shafi and  Zafar Javed,  Three Computational Mathematics Techniques: Comparative Determination of Area under Curve.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    May 2010, vol. 41(5). 548 - 552
    [viewed 20 October 2019]. Available from: https://publications.waset.org/pdf/13325.