Chicago Teachers Union, Local No. 1 v. Hudson , 106 S. Ct. 1066 ( 1986 )
Lehnert v. Ferris Faculty Assn. , 111 S. Ct. 1950 ( 1991 )
Ellis v. Brotherhood of Railway, Airline & Steamship Clerks, Freight Handlers, Express & Station Employes , 104 S. Ct. 1883 ( 1984 )