TY - GEN TI - Recent trends in nonlinear analysis: festschrift dedicated to Alfonso Vignoli on the occasion of his sixtietd birthday SN - 3764362928 PY - 2000/// CY - Basel, Boston, Berlin PB - Birkhauser KW - Bifurcation theorem for Lagrangian intersections N1 - Contine bibliogr. pe capitole ER -