Melakhessou, Ahlem, et al. “$\mathbb{Z}_q(\mathbb{Z}_q+u\mathbb{Z}_q)$-Linear Skew Constacyclic Codes”. Journal of Algebra Combinatorics Discrete Structures and Applications, vol. 7, no. 1, Jan. 2020, pp. 85-101, doi:10.13069/jacodesmath.671815.