Taher Abualrub Ali Ghrayeb Robert H. Oehmke A mass formula and rank of ℤ<sub>4</sub> cyclic codes of length 2<sup>e</sup>. 3306-3312 2004 50 IEEE Trans. Inf. Theory 12 https://doi.org/10.1109/TIT.2004.838109 db/journals/tit/tit50.html#AbualrubGO04