@article{articlee869ecc6, title = {Symmetries and induced effects in bilayer and multilayer antiferroelectric and ferrielectric liquid crystal phases}, author = {Toledano, P. and Figueiredo Neto, Antônio Martins and Boulbitch, A. A. and Roy, A.}, year = {1999}, doi = {10.1103/physreve.59.6785}, journal = {Physical Review E} }