@article {134,
	title = {Polarization switching in PbTiO3: an ab initio finite element simulation},
	journal = {Acta Materialia},
	volume = {50},
	year = {2002},
	pages = {2989},
	author = {E.B. Tadmor and U.V. Waghmare and G.S. Smith and E. Kaxiras}
}
