P. Binetruy et Mk. Gaillard, S-DUALITY CONSTRAINTS ON EFFECTIVE POTENTIALS FOR GAUGINO CONDENSATION, Physics letters. Section B, 365(1-4), 1996, pp. 87-97
We clarify the role of approximate S-duality in effective supergravity
theories that are the low energy limits of string theories, and show
how this partial symmetry may be used to constrain effective lagrangia
ns for gaugino condensation.