 {\displaystyle { \!\!\!\!\!\!\!\!\!\!\!\!\!\sum_{\begin{array}{c} {\scriptstyle k'n'} \\    \left(\begin{array}{c} {\scriptstyle kk'<0} \\    {\scriptstyle E_{k'n'}^{\scriptscriptstyle (l)}=E_{kn}^{\scriptscriptstyle (j)}} \end{array}\right) \end{array} }    \!\!\!\!\!\!\!\!\!\!\!\!\!\!\! }} t_{\scriptscriptstyle (k',n':k,n)}^{\scriptscriptstyle (l,j)}\langle \; {\mbox{\boldmath $x$}}, {\mbox{\boldmath $X$}}\mid\Phi_{k'n'}^{\scriptscriptstyle (