@article {9587,
	title = {Phase diagram of ferroelectric BaTiO3 ultrathin films under open-circuit conditions},
	journal = {Journal of Physics Condensed Matter},
	year = {2008},
	doi = {10.1088/0953-8984/20/13/135203},
	author = {Jie Yu and Zhongqing Wu and Zhirong Liu and Qimin Yan and Jian Wu and Wenhui Duan}
}
