Racah Sum Rule and Biedenharn-Elliott Identity for the Super-Rotation   $6-j$ symbols
  It is shown that the well known Racah sum rule and Biedenharn-Elliott identity satisfied by the recoupling coefficients or by the $6-j$ symbols of the usual rotation $SO(3)$ algebra can be extended to the corresponding features of the super-rotation $osp(1|2)$ superalgebra. The structure of the sum rules is completely similar in both cases, the only difference concerns the signs which are more involved in the super-rotation case. 
Pierre Minnaert and Stoyan Toshev