@article {9422,
	title = {A universal relationship between magnetic resonance and superconducting gap in unconventional superconductors},
	journal = {Nature Physics},
	year = {2009},
	pages = {873-875},
	doi = {10.1038/nphys1426},
	author = {G. Yu and Y. Li and E.M. Motoyama and M. Greven}
}
