Fraction of Strong Barred Galaxies (SB) in groups in the Nearby
  Universe, 0 < z < 0.066, as a function of redshift
  An analysis of 913 groups of galaxies and 56 Abell clusters from the
literature has been made in order to estimate the mean of the fraction of
strong barred galaxies SB/(S+SB) in the redshift interval 0 < z < 0.066
