Gr\'ebert B., Guillot J.-C., Klopp F. On the spectrum of odd order self adjoint ordinary differential operators on the real line with quasi-periodic coefficients (133K, Uuencoded gunzipped Postscript) ABSTRACT. In this paper we prove that an odd order self-adjoint differential operator on the real line with quasi-periodic coefficients has only absolute continuous simple spectrum for large enough energies.