...19. April 2012 - 2 AZR 233/11 - Rn. 41, NZA 2012, 1449; 8. September 2011 - 2 AZR 388/10 - Rn. 40, AP KSchG 1969 § 15 Nr. 70 = EzA BetrVG 2001 § 25 Nr. 3). ...