TY - JOUR AU - Gil', Michael I. TI - Liapunov exponents for higher-order linear differential equations whose characteristic equations have variable real roots JO - Electronic journal of differential equations PY - 2008 VL - 2008 UR - http://geodesic.mathdoc.fr/item/EJDE_2008__2008__a40/ LA - en ID - EJDE_2008__2008__a40 ER -