From the contents: A. Arosio: Global solvability of second order evolution equations in Banach scales.- H. Beirao da Veiga: On the incompressible limit of the compressible Navier-Stokes equations.- A. Bove: Propagation of singularities for hyperbolic operators with double characteristics.- G. Buttazzo: Relaxation problems in control theory.- R. Finn: The inclination of an H-graph.- P.R. Garabedian: On the mathematical theory of vortex sheets.- N. Garofalo: New estimates of the fundamental solution and Wiener's criterion for parabolic equations with variable coefficients.- M.G. Garroni: Green function and invariant density for an integro-differential operator.- M. Giaquinta: Some remarks on the regularity of minimizers.- E. Giusti: Quadratic functionals with splitting coefficients.- R. Gulliver: Minimal surfaces on finite index in manifolds of positive scalar curvature.- R. Hardt, D. Kinderlehrer, M. Luskin: Remarks about the mathematical theory of liquid crystals.- E. Heinz: On quasi-minimal surfaces.- P. Laurence, E. Stredulinsky: A survey of recent regularity results for second order queer differential equations.- C.-S. Lin, W.-M. Ni: On the diffusion coefficient of a semilinear Neumann problem.- M. Longinetti: Some isoperimetric inequalities for the level curves of capacity and Green's functions on convex plane domains.- P. Marcati: Nonhomogeneous quasilinear hyperbolic systems: initial and boundary value problem.- E. Mascolo: Existence results for non convex problems of the calculus of variations.- U. Mosco: Wiener criteria and