Urie v. Thompson , 69 S. Ct. 1018 ( 1949 )
Celotex Corp. v. Catrett, Administratrix of the Estate of Catrett , 106 S. Ct. 2548 ( 1986 )
Atchison, Topeka & Santa Fe Railway v. Buell , 107 S. Ct. 1410 ( 1987 )