New Wrinkles on an Old Model: Correlation Between Liquid Drop Parameters   and Curvature Term
  The relationship between the volume and surface energy coefficients in the liquid drop A^{-1/3} expansion of nuclear masses is discussed. The volume and surface coefficients in the liquid drop expansion share the same physical origin and their physical connection is used to extend the expansion with a curvature term. A possible generalization of the Wigner term is also suggested. This connection between coefficients is used to fit the experimental nuclear masses. The excellent fit obtained with a smaller number of parameters validates the assumed physical connection. 
Luciano G. Moretto, James B. Elliott, Peter T. Lake and Larry Phair
nucl-th