New non-binary quantum codes from skew constacyclic and additive skew constacyclic codes Ram Krishna Verma, Om Prakash, Habibul Islam and Ashutosh Singh Eur. Phys. J. Plus, 137 2 (2022) 213 Published online: 08 February 2022 DOI: 10.1140/epjp/s13360-022-02429-9