@article { 1752,
	title = {DMRG study of the Bond Alternating S=1/2 Heisenberg ladder with Ferro-Antiferromagnetic couplings },
	volume = {76},
	year = {2007},
	pages = {184428},
	publisher = {Phys. Rev. B},
	URL = {http://arxiv.org/abs/0705.0116},
	author = {J. Almeida, M.A. Martin-Delgado, G. Sierra}
}