E-print: http://arxiv.org/abs/1602.03043
E-print: https://arxiv.org/abs/cond-mat/0204047
E-print: https://arxiv.org/abs/1702.08029
E-print: http://arxiv.org/abs/0904.0900
E-print: https://arxiv.org/abs/1806.07791
E-print: http://arxiv.org/abs/cond-mat/0101120
E-print: http://arxiv.org/pdf/1009.1100.pdf
E-print: http://arxiv.org/abs/1206.2153
E-print: http://arxiv.org/pdf/1601.04478v1
E-print: http://arxiv.org/PS_cache/arxiv/pdf/1009/1009.2928v1.pdf
E-print: http://arxiv.org/abs/1412.7108!
E-print: http://arxiv.org/abs/cond-mat/0501292
E-print: https://arxiv.org/abs/1906.05187
E-print: https://hal.archives-ouvertes.fr/jpa-00246951/document
E-print: https://arxiv.org/abs/1708.00644
E-print: http://ssrn.com/abstract=2777657
E-print: http://arxiv.org/abs/1409.8321