Phenomenological Scale Factors for the Liquid-Vapor Critical Transition   of Pure Fluids
  We discuss a phenomenological method which allows to determine the singular asymptotic behaviours for a pure fluid at equilibrium, when the liquid-gas critical point and the tangent plane to the characteristic surface of this point are localized experimentally, in the pressure, density and temperature coordinates. 
Yves Garrabos (ICMCB)