Mutual friction between parallel two-dimensional electron systems.

@article{Gramila1991MutualFB,
  title={Mutual friction between parallel two-dimensional electron systems.},
  author={Gramila and Eisenstein and B Macdonald and Nat Thies Pfeiffer and M West},
  journal={Physical review letters},
  year={1991},
  volume={66 9},
  pages={1216-1219}
}