Rattiya Boonruang and  Aiyared Iampan,  The Baer Radical of Rings in Term of Prime and Semiprime Generalized Bi-ideals.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    December 2011, vol. 60(12). 2077 - 2079
    [viewed 16 April 2021]. Available from: https://publications.waset.org/pdf/15439.