On Some Classes of Z2Z4−\mathbb{Z}_{2}\mathbb{Z}_{4}-Linear Codes and their Covering Radius

In this paper we define $\mathbb{Z}_{2}\mathbb{Z}_{4}-$Simplex and MacDonald Codes of type $\alpha$ and $\beta$ and we give the covering radius of these codes.Comment: arXiv admin note: text overlap with arXiv:1411.1822 by other author