@article {Hu2013,
	title = {Direct evidence for a gapless Z(2) spin liquid by frustrating Neel antiferromagnetism},
	journal = {Physical Review B},
	volume = {88},
	number = {6},
	year = {2013},
	month = {aug},
	pages = {060402},
	doi = {10.1103/PhysRevB.88.060402},
	author = {Hu, Wen-Jun and Becca, Federico and Parola, Alberto and Sorella, Sandro}
}
