Norhashidah Hj. Mohd Ali and Teng Wai Ping, New Fourth Order Explicit Group Method in the Solution of the Helmholtz Equation. journal = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology. January 2015, vol. 97(1). 7 - 11 [viewed 20 September 2024]. Available from: https://publications.waset.org/pdf/10000115.