  In previous works, we studied the isotropisation of Bianchi class A models
with a minimally coupled scalar field. In this paper, we extend these results
to the case of a non minimally coupled one. We first make the calculations in
the Einstein frame where the scalar field is minimally coupled to the curvature
but non minimally coupled to the perfect fluid. Then, we use a conformal
transformation to generalise our results to a scalar field non minimally
coupled to the curvature. Universe isotropisation for the Brans-Dicke and low
energy string theories are studied.
