$$\begin{array}{cc}\left(y+q\right)R_J\left(x,y,z,-q\right)=& \left(p-y\right)R_J\left(x,y,z,p\right)-3R_F\left(x,y,z\right)\\ & +3{\left(\frac{xyz}{xz+pq}\right)}^{\frac{1}{2}}{R}_C\left(xz+pq,pq\right)\\ \text{with:}q>0& \text{and:}p=y+\frac{\left(z-y\right)\left(y-x\right)}{\left(y+q\right)}\end{array}$$