Asystatic G-manifolds of cohomogeneity 2 and Riemannian surfaces, D. Alekseevski; les paquets de cercles, M. Berger; exotic differentiable structures on R4, M. Demichelis; surface theory, harmonic maps and commuting Hamiltonian flows, D. Ferus; Riemannian geometry of algebraic manifolds, M. Gromov; sphere packings and spherical geometry - Kepler's conjecture and beyond, W.Y. Hsiang; a combinatorial approach to recent 3-manifolds invariants, S.L.S. Lins; cohomology operations and modular invariant theory, L. Lomonaco; scalar curvature and conformal deformation of riemannian manifolds, A. Ratto; lectures on combinatorial presentations of manifolds, O. Viro.