On cyclic reversible self-dual additive codes with odd length over Ƶ22

Several additive codes of odd length over Ƶ₂² are introduced. These codes are cyclic and reversible. Furthermore, they are self-dual under an appropriately selected binary-valued inner product. Some binary derivatives of these codes have good parameters. All cyclic and reversible [5,2.5,3] additive codes over Ƶ₂² are isomorphic and possess interesting properties