Celotex Corp. v. Catrett, Administratrix of the Estate of Catrett , 106 S. Ct. 2548 ( 1986 )
Gilmer v. Interstate/Johnson Lane Corp. , 111 S. Ct. 1647 ( 1991 )
Burlington Industries, Inc. v. Ellerth , 118 S. Ct. 2257 ( 1998 )