Teerayut Chomchuen and  Aiyared Iampan,  On Properties of Generalized Bi-Γ-Ideals of Γ-Semirings.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    October 2013, vol. 77(5). 882 - 885
    [viewed 22 May 2022]. Available from: https://publications.waset.org/pdf/17224.