Statistical Mechanics of Biocomplexity Proceedings of the XV Sitges Conference, Held at Sitges, Barcelona, Spain, 8-12 June 1998 - Reguera, D.; Reguera, D.; Vilar, J.M.G; Vilar, J.M.G; Rubi, J.M; Rubi, J.M (Springer Berlin Heidelberg : Imprint: Springer, 1999)