Pressure-temperature phase diagrams of selenium and sulfur in terms of   Patashinski model
  The pressure - temperature phase diagrams of Se and S are calculated. Both melting and polymorphous phase transition are described in the frames of statistical Patashinski model. The results are in good agreement with experimental data of Brazhkin et. al. 
L.D.Son, G.M.Rusakov, N.N.Katkov