@article {10807,
	title = {Quantum phase transitions in a spin ladder with long-range couplings},
	journal = {Nuclear Physics B},
	year = {2005},
	pages = {352-359},
	doi = {10.1016/j.nuclphysb.2005.09.042},
	author = {Junpeng Cao and Gang Xiong and X.C. Xie and X.R. Wang and Yupeng Wang}
}
