@article {6375,
	title = {Gap solitons and Bloch waves in nonlinear periodic systems},
	journal = {Physical Review A - Atomic, Molecular, and Optical Physics},
	year = {2009},
	doi = {10.1103/PhysRevA.80.063815},
	author = {Yongping Zhang and Zhaoxin Liang and Biao Wu}
}
