Gaussian density fluctuations and mode coupling theory for supercooled liquids E. Zaccarelli, G. Foffi, F. Sciortino, P. Tartaglia and K. A. Dawson Europhys. Lett., 55 2 (2001) 157-163 Published online: 01 December 2003 DOI: 10.1209/epl/i2001-00395-x