| Name | Info | Provider | Link |
|---|---|---|---|
| subscription/membership/fee required | American Physical Society | https://link.aps.org/abstract/PRL/v64/p1095 | |
| Full text from University of California eScholarship | free resource | eScholarship, California Digital Library, University of California | https://escholarship.org/uc/item/1d87q3w7 |