Direct and Inverse Methods in Nonlinear Evolution Equations Lectures Given at the C.I.M.E. Summer School Held in Cetraro, Italy, September 5-12, 1999 - Conte, Robert M.; Conte, Robert M.; Magri, Franco; Musette, Micheline; Satsuma, Junkichi; Winternitz, Pavel (Springer Berlin Heidelberg : Imprint: Springer, 2003)