Jaipong Kasemsuwan,  The Finite Difference Scheme for the Suspended String Equation with the Nonlinear External Forces.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    September 2013, vol. 81(9). 1393 - 1398
    [viewed 09 May 2024]. Available from: https://publications.waset.org/pdf/16658.