TY - RPRT TI - Mutual friction between parallel two-dimensional electron systems. AU - TJ Gramila AU - JP Eisenstein AU - AH MacDonald AU - LN Pfeiffer AU - KW West PY - 1991 DO - 10.1103/physrevlett.66.1216 UR - https://pubmed.ncbi.nlm.nih.gov/10044025/ ID - 10044025 ER -