@article {SaadaouiTRSB2011,
	title = {Search for broken time-reversal symmetry near the surface of superconducting YBa$_{2}$Cu$_{3}$O$_{7-δ$ films using $\beta$-detected nuclear magnetic resonance},
	journal = {Phys. Rev. B},
	volume = {83},
	year = {2011},
	month = {Feb},
	pages = {054504},
	publisher = {American Physical Society},
	doi = {10.1103/PhysRevB.83.054504},
	url = {http://link.aps.org/doi/10.1103/PhysRevB.83.054504},
	author = {Saadaoui, H. and Morris, G. and Salman, Z. and Song, Q. and Chow, K. and Hossain, M. and Levy, C. and Parolin, T. and Pearson, M. and Smadella, M. and Wang, D. and Greene, L. and Hentges, P. and Kiefl, R. and MacFarlane, W.}
}
