...8 - C-54/07, Slg. 2008, I-5187 = NJW 2008, 2767 - Feryn; ferner BAGE 142, 158 Rn. 31; Däubler in ders./Bertzbach aaO § 1 Rn. 38, 44; Palandt/Ellenberger aaO § 1 Rn. 2). ...