Sharmila Karim and Haslinda Ibrahim and Zurni Omar, New Scheme in Determining nth Order Diagrams for Cross Multiplication Method via Combinatorial Approach. journal = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology. June 2011, vol. 54(6). 920 - 923 [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/12156.