with α, β = 3, 4, 5, 6 and a, b = -1, -1 2 , 0, 1 2 , 1, to investigate whether different schemes could universally improve the remaining deviations reported in Table . For the first Eq.44, no combination gives overall better results, whether for the augmented or non-augmented bases, reinforcing the recommendation of Helgaker (29) for DT points only and Martin4 (23) for TQ or Q5 pairs. If three points are available, however, two new expressions stand out as providing very similar or lower deviations than those of Helgaker and Martin4. We call them from now on Rovibi34 and Rovibi45 defined by