E-print: http://arxiv.org/PS_cache/arxiv/pdf/0905/0905.3096v1.pdf
E-print: http://arxiv.org/abs/1403.7763
E-print: http://arxiv.org/abs/1301.4939
E-print: http://arxiv.org/abs/physics/0507111
E-print: https://arxiv.org/abs/1902.01802
E-print: http://arxiv.org/abs/1205.3598
E-print: http://arxiv.org/abs/1209.6171
E-print: http://arxiv.org/abs/1603.04364v1
E-print: https://arxiv.org/abs/1901.05543
E-print: http://arxiv.org/abs/cond-mat/0005319
E-print: http://arxiv.org/abs/1306.3110
Published in: Physica A, Elsevier, 2003, 326, pp.241-255
E-print: http://arxiv.org/abs/1412.7108!
E-print: http://arxiv.org/abs/cond-mat/0504079
E-print: http://arxiv.org/abs/cond-mat/9707047
E-print: http://arxiv.org/abs/1207.7308
E-print: http://arxiv.org/abs/cond-mat/9909245
E-print: https://arxiv.org/abs/1707.01457