Normally hyperbolic operators, the Huygens property and conformal geometry Helga BaumInes Kath ReviewPaper Pages: 315 - 371
Submanifolds of constant sectional curvature in Pseudo-Riemannian manifolds João Lucas BarbosaWalterson FerreiraKeti Tenenblat OriginalPaper Pages: 381 - 401
Invariants of contact structures and transversally oriented foliations Augustin Banyaga OriginalPaper Pages: 427 - 441