Article: https://www.tandfonline.com/toc/rquf20/1/5?nav=tocList
E-print: http://arxiv.org/abs/cond-mat/0002374
E-print: https://arxiv.org/abs/2006.08469
E-print: http://arxiv.org/abs/1307.5319
E-print: https://arxiv.org/abs/cond-mat/0204047
E-print: http://arxiv.org/PS_cache/arxiv/pdf/1009/1009.2928v1.pdf
E-print: http://arxiv.org/abs/cond-mat/0501292
E-print: https://hal.archives-ouvertes.fr/jpa-00246951/document
E-print: http://arxiv.org/abs/1409.8321
E-print: https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2742730
E-print: http://arxiv.org/abs/cond-mat/0303584
E-print: http://arxiv.org/abs/cond-mat/9509095
E-print: http://arxiv.org/abs/cond-mat/9801209
E-print: http://arxiv.org/abs/cond-mat/0008103
E-print: https://arxiv.org/abs/cond-mat/0011506