Violation of Equivalence Principle and Solar Neutrinos
  We have updated the analysis for the solution to the solar neutrino problem by the long-wavelength neutrino oscillations induced by a tiny breakdown of the weak equivalence principle of general relativity, and obtained a very good fit to all the solar neutrino data. 
A. M. Gago, H. Nunokawa and R. Zukanovich Funchal