1. Classification of the group of units in the Gaussian integers modulo n;Allan A. A.;Pi Mu Epsilon J,2008
2. The group of units of a group algebra of characteristic $p$
3. On the unit group of a commutative group ring
4. Dennis, R. K. (1977). The structure of the unit group of group rings. In: Ring Theory II (Proceedings of Second Conference, University Oklahoma, Norman, Okla., 1975), Lecture Notes in Pure and Applied Mathematics, Vol. 26, pp. 103–130.
5. A note on normal complements in mod p envelopes;Ivory L. R.;Proc. Amer. Math. Soc,1980