Citation: Boullay, P.; Teneze, N.; Trolliard, G.; Mercurio, D.; Perez-Mato, J.M. (2003). Superspace description of the hexagonal perovskites in the system (Ba5 Nb4 O15) - (Ba Ti O3) as modulated layered structures. Journal of Solid State Chemistry, 174, pp. 209-220.