E-print: https://arxiv.org/abs/1707.01457
E-print: http://arxiv.org/abs/cond-mat/9909245
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E-print: http://arxiv.org/abs/cond-mat/0002374
E-print: https://arxiv.org/abs/2006.08469
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E-print: https://arxiv.org/abs/1706.04163
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E-print: https://arxiv.org/abs/1702.03838
E-print: http://arxiv.org/abs/1307.5319
E-print: http://arxiv.org/abs/cond-mat/0504079