Shalala v. Illinois Council on Long Term Care, Inc. , 120 S. Ct. 1084 ( 2000 )
Barnhart v. Sigmon Coal Co. , 122 S. Ct. 941 ( 2002 )
Chevron U. S. A. Inc. v. Natural Resources Defense Council, Inc. , 104 S. Ct. 2778 ( 1984 )