Block v. Rutherford , 104 S. Ct. 3227 ( 1984 )
Turner v. Safley , 107 S. Ct. 2254 ( 1987 )
Cruz v. Beto , 92 S. Ct. 1079 ( 1972 )
O'Lone v. Estate of Shabazz , 107 S. Ct. 2400 ( 1987 )