Whitley v. Albers , 106 S. Ct. 1078 ( 1986 )
Estelle v. Gamble , 97 S. Ct. 285 ( 1976 )
Neitzke v. Williams , 109 S. Ct. 1827 ( 1989 )
Denton v. Hernandez , 112 S. Ct. 1728 ( 1992 )