Jianmin Xing,  Generalized Module Homomorphisms of Triangular Matrix Rings of Order Three.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    August 2012, vol. 68(8). 1136 - 1139
    [viewed 18 April 2024]. Available from: https://publications.waset.org/pdf/5990.