V. A. Vakhrameev and M. A. Petros'yants. 1973. Distribution of plant fossils. In N. V. Beznosov , M. S. Burshtar (eds.), Ob'yasnitel'naya zapiska k stratigraphicheskoi skheme yurskikh otlozhenii Severnogo Kavkaza. (Explanatory notes for stratigraphic scheme of Jurassic deposits of the North Caucasus) 154-155 [A. Rees/A. Rees/S. Bruning]