-\newcommand{\grefzc}{ T^0_{\pc} }
-\newcommand{\grefcc}{ T_{\pc} }
-\newcommand{\grefuc}{ T'_{\pc} }
-\newcommand{\greffc}{ T^*_{\pc} }
+\newcommand{\grefz}{ T^0 }
+\newcommand{\grefc}{ T }
+\newcommand{\grefu}{ T' }
+\newcommand{\greff}{ T^* }
+
+\newcommand{\grefza}[1]{ \grefz_{#1} }
+\newcommand{\grefca}[1]{ \grefc_{#1} }
+\newcommand{\grefua}[1]{ \grefu_{#1} }
+\newcommand{\greffa}[1]{ \greff_{#1} }
+
+\newcommand{\grefzc}{ \grefza \pc }
+\newcommand{\grefcc}{ \grefca \pc }
+\newcommand{\grefuc}{ \grefua \pc }
+\newcommand{\greffc}{ \greffa \pc }