Vitek v. Jones , 100 S. Ct. 1254 ( 1980 )
Lassiter v. Department of Social Servs. of Durham Cty. , 101 S. Ct. 2153 ( 1981 )
Mallard v. United States Dist. Court for Southern Dist. of Iowa , 109 S. Ct. 1814 ( 1989 )