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Gubser DU, Hein RA, Lawrence SH, Osofsky MS, Schrodt DJ, Toth LE, Wolf SA.Gubser DU, et al. Among authors: hein ra.Phys Rev B Condens Matter. 1987 Apr 1;35(10):5350-5352. doi: 10.1103/physrevb.35.5350.Phys Rev B Condens Matter. 1987.PMID: 9940734No abstract available.