@article {10819,
	title = {Entanglement control in an anisotropic two-qubit Heisenberg XYZ model with external magnetic fields},
	journal = {Physical Review A - Atomic, Molecular, and Optical Physics},
	year = {2006},
	doi = {10.1103/PhysRevA.74.052105},
	author = {Ahmad Abliz and H.J. Gao and X.C. Xie and Y.S. Wu and W.M. Liu}
}
