TY - JOUR AU - Vijay Kumar Bhat TI - On $(\sigma,\delta) - (S,1)$ rings and their extensions JO - Mathematica Moravica PY - 2017 SP - 61 EP - 68 VL - 21 IS - 1 PB - mathdoc UR - https://geodesic-test.mathdoc.fr/item/MM3_2017_21_1_a5/ ID - MM3_2017_21_1_a5 ER -