Nachman Corp. v. Pension Benefit Guaranty Corporation , 100 S. Ct. 1723 ( 1980 )
Lewis v. Benedict Coal Corp. , 80 S. Ct. 489 ( 1960 )
Operating Engineers Pension Trust, and Cross-Appellees v. Harold E. Reed, Etc., and Cross-Appellants , 726 F.2d 513 ( 1984 )