S.Krishnamoorthy and  R.Arul Doss,  Commuting Regular Γ-Semiring.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    August 2010, vol. 44(8). 1101 - 1103
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/3837.