@article {156301,
	title = {High-frequency behavior of ideal superconducting point contacts},
	journal = {Physical Review Letters},
	volume = {40},
	number = {4},
	year = {1978},
	pages = {253-256},
	abstract = {We have studied niobium point contacts which are very consistent and reproducible from junction to junction, in both their dc and high-frequency behavior. We find a strong correlation between the sharpness of the gap structure and the ac Josephson effect, and we present the first quantitative measurements of the far-infrared frequency dependence of the Josephson effect above the energy gap. The measured\&nbsp;I-V\&nbsp;curves are also compared with available theoretical models.},
	url = {https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.40.253},
	author = {Weitz, D. A. and Skocpol, W. J. and Tinkham, M.}
}
