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In previous works, we studied the isotropisation of Bianchi class A modelswith a minimally coupled scalar field. In this paper, we extend these resultsto the case of a non minimally coupled one. We first make the calculations inthe Einstein frame where the scalar field is minimally coupled to the curvaturebut non minimally coupled to the perfect fluid. Then, we use a conformaltransformation to generalise our results to a scalar field non minimallycoupled to the curvature. Universe isotropisation for the Brans-Dicke and lowenergy string theories are studied.Comment: 32 pages, 9 figures (low resolution

Isotropisation of flat homogeneous Bianchi type I model with a non minimally coupled and massive scalar field