Pieper v. Ametek-Thermox Instruments Division , 526 Pa. 25 ( 1990 )
Sheehan v. Workmen's Compensation Appeal Board , 143 Pa. Commw. 624 ( 1991 )
Carnegie Mellon University v. Workmen's Compensation Appeal Board , 165 Pa. Commw. 392 ( 1994 )