Stochastic methods in finance lectures given at the C.I.M.E.-E.M.S. Summer School, held in Bressanone/Brixen, Italy, July 6-12, 2003 / K. Back ... [et al.] ; editors, M. Frittelli, W. Runggaldier. - Frittelli, M. (Marco); Runggaldier, W. J. (Wolfgang J.) (Lecture notes in mathematics (Springer-Verlag), 2004)