E-print: http://arxiv.org/abs/cond-mat/9607120
E-print: http://arxiv.org/abs/cond-mat/9705087
E-print: http://arxiv.org/abs/cond-mat/9712164
E-print: http://arxiv.org/abs/cond-mat/9810255
Published in: International Journal of Theoretical and Applied Finance - Volume 03, Issue 03, July 2000
E-print: http://arxiv.org/abs/cond-mat/9906347
E-print: http://arxiv.org/abs/cond-mat/9907297
E-print: http://arxiv.org/abs/cond-mat/0006034
E-print: http://arxiv.org/abs/cond-mat/0101120
Published in: Physica A: Statistical Mechanics and its Applications - Volume 299, Issues 1–2, 1 October 2001, Pages 60–70
E-print: http://arxiv.org/abs/cond-mat/0203511
E-print: http://arxiv.org/abs/cond-mat/0210710
E-print: http://arxiv.org/abs/cond-mat/03073322
E-print: http://arxiv.org/abs/cond-mat/0403713
E-print: http://arxiv.org/abs/cond-mat/0406224
E-print: http://arxiv.org/abs/cond-mat/0410079
E-print: http://arxiv.org/abs/physics/0603084