Equation Icon  AB-' 4p-3 AA'BB' A- B-' ( 4) PSr = 3 r T tAA'EB EB' + O r , (28) 4p '( ' ) ( ) JASrB-= --r3TAA'BB'tAA rtB EeBF EA(EEFB) + O r5 , (29) 3