1. V. A. Ustimenko and A. J. Woldar, An improvement on the Erdős bound for graphs of girth 16, Second International Conference on Algebra (Barnaul, 1991), Contemp. Math., vol. 184, Amer. Math. Soc., Providence, RI, 1995, pp. 419–425.[MR]
  2. Andrew J. Woldar and Vasiliy A. Ustimenko, An application of group theory to extremal graph theory, Group Theory (Granville, OH, 1992), World Sci. Publishing, River Edge, NJ, 1993, pp. 293–298.[MR]