TY - JOUR AU - A. A. Gura TI - Homological equations and topological properties of $S^1$-extensions over an ergodic rotation of the circle JO - Matematičeskie zametki PY - 1978 SP - 463 EP - 470 VL - 23 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1978_23_3_a13/ LA - ru ID - MZM_1978_23_3_a13 ER -