TY - RPRT TI - Fractional quantum Hall effect at half-filled Landau level in a multiple-layer electron system. AU - T Chakraborty AU - P Pietiläinen PY - 1987 DO - 10.1103/physrevlett.59.2784 UR - https://pubmed.ncbi.nlm.nih.gov/10035647/ ID - 10035647 ER -