Hca Health Services of Oklahoma, Inc. v. Donna E. Shalala, Secretary, Department of Health and Human Services , 27 F.3d 614 ( 1994 )
Appalachian Regional Healthcare, Inc. v. Shalala , 131 F.3d 1050 ( 1997 )
Auer v. Robbins , 117 S. Ct. 905 ( 1997 )
Chevron U. S. A. Inc. v. Natural Resources Defense Council, Inc. , 104 S. Ct. 2778 ( 1984 )