E-print: http://arxiv.org/abs/cond-mat/0006034
E-print: http://arxiv.org/abs/cond-mat/0005319
E-print: http://arxiv.org/abs/cond-mat/0005148
E-print: http://arxiv.org/abs/cond-mat/0002374
E-print: http://arxiv.org/abs/cond-mat/9909245
E-print: http://arxiv.org/abs/cond-mat/9907297
E-print: http://arxiv.org/abs/cond-mat/9906347
Published in: International Journal of Theoretical and Applied Finance - Volume 03, Issue 03, July 2000
E-print: http://arxiv.org/abs/cond-mat/9810255
E-print: http://arxiv.org/abs/cond-mat/9808206
E-print: http://arxiv.org/abs/cond-mat/9801279
E-print: http://arxiv.org/abs/cond-mat/9801209
E-print: http://arxiv.org/abs/cond-mat/9712318
E-print: http://arxiv.org/abs/cond-mat/9712164
E-print: http://arxiv.org/abs/cond-mat/97101977