Mei Li and  Fahui Zhai,  Necessary and Sufficient Condition for the Quaternion Vector Measure.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    November 2016, vol. 115(7). 362 - 365
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10006038.