@article {Lupien2001,
	title = {Ultrasound Attenuation in ${\mathrm{Sr}_{2}{\mathrm{RuO}_{4}$: An Angle-Resolved Study of the Superconducting Gap Function},
	journal = {Phys. Rev. Lett.},
	volume = {86},
	year = {2001},
	month = {Jun},
	pages = {5986{\textendash}5989},
	publisher = {American Physical Society},
	doi = {10.1103/PhysRevLett.86.5986},
	url = {http://link.aps.org/doi/10.1103/PhysRevLett.86.5986},
	author = {Lupien, C. and MacFarlane, W. and Proust, Cyril and Taillefer, Louis and Mao, Z. and Maeno, Y.}
}
