Chiharu Okuma and  Naoki Yamamoto and  Jun Murakami,  An Improved Algorithm for Calculation of the Third-order Orthogonal Tensor Product Expansion by Using Singular Value Decomposition.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2010, vol. 38(2). 193 - 202
    [viewed 20 April 2021]. Available from: https://publications.waset.org/pdf/14985.