We confirm our previous conclusion that the z-distribution of absorption-line systems observed in QSO spectra contains non-uniform component displaying a pattern of statistically significant alternating maxima (peaks) and minima (dips). The positions of the maxima and minima of the z-distributions obtained for different celestial hemispheres turn out to be weakly sensitive to orientations of the hemispheres. The data reveal a periodicity of the sequence of the peaks and dips with respect to some rescaling functions of z. The structure under discussion may be described by a family of oscillating Hubble functions H(z) which are quite consistent with the distribution of luminosity distances to Supernova Ia.

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updated on May 25, 2007.