Wm. Penn Parking Garage, Inc. v. City of Pittsburgh , 464 Pa. 168 ( 1975 )
Gateside-Queensgate Co. v. Delaware Petroleum Co. , 134 Pa. Commw. 603 ( 1990 )
Statewide Building Maintenance, Inc. v. Pennsylvania Convention Center Authority , 160 Pa. Commw. 544 ( 1993 )