On Hamming and b-symbol distance distributions of repeated-root constacyclic codes of length $$4p^s$$ over $${ pmb { mathbb {F}}}_{p^m}+u { pmb { mathbb {F}}}_{p^m}$$. - Hai Q. Dinh 001; Abhay Kumar Singh; Madhu Kant Thakur (J. Appl. Math. Comput., 2021)

On symbol-pair distances of repeated-root constacyclic codes of length 2ps over ${ mathbb {F}}_{p^m}+u{ mathbb {F}}_{p^m}$ and MDS symbol-pair codes. - Hai Q. Dinh 001; Abhay Kumar Singh; Madhu Kant Thakur (Appl. Algebra Eng. Commun. Comput., 2023)