Mona Taheri,  How are Equalities Defined, Strong or Weak on a Multiple Algebra?.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    September 2010, vol. 45(9). 1325 - 1328
    [viewed 19 March 2024]. Available from: https://publications.waset.org/pdf/13948.