Constacyclic and quasi-twisted codes over $ mathbb{Z}_{q}[u]/ langle u^{2}-1 rangle $ and new $ mathbb{Z}_4 $-linear codes. - Amina Bellil; Kenza Guenda; Nuh Aydin; Peihan Liu; T. Aaron Gulliver (Adv. Math. Commun., 2024)