To cite rTensor in publications use:

Li J, Bien J, Wells MT (2018). “rTensor: An R Package for Multidimensional Array (Tensor) Unfolding, Multiplication, and Decomposition.” Journal of Statistical Software, 87(10), 1–31. doi: 10.18637/jss.v087.i10.

Corresponding BibTeX entry:

  @Article{,
    title = {{rTensor}: An {R} Package for Multidimensional Array
      (Tensor) Unfolding, Multiplication, and Decomposition},
    author = {James Li and Jacob Bien and Martin T. Wells},
    journal = {Journal of Statistical Software},
    year = {2018},
    volume = {87},
    number = {10},
    pages = {1--31},
    doi = {10.18637/jss.v087.i10},
  }