PPL Corp. & Subsidiaries v. Commissioner , 135 T.C. 176 ( 2010 )
Clajon Gas Co., L.P., Aquila Gas Pipeline Corp., Tax Matters Partner v. Commissioner , 119 T.C. No. 12 ( 2002 )
Duke Energy Natural Gas Corp. v. Commissioner , 172 F.3d 1255 ( 1999 )