Literatur: BVerfG, 18.04.1961 - 1 BvR 389/56, 1 BvR 416/56, 1 BvR 615/56, 1 BvR 43/57, 1 BvR 47/57, 1 BvR 127/57, 1 BvR 355/57, 1 BvR 372/57